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Worksheets

10.3 Quiz Review

Total questions: 80

Worksheet time: 7hrs 40mins

Name
Class
Date
1.

What is the reciprocal of the sine function?

a)

cosecant

b)

cosine

c)

secant

d)

cotangent

2.
Secant is the reciprocal of what function?
a)
Cosecant
b)
Sine
c)
Cosine
d)
Tangent
3.
Cotangent is the reciprocal of what function?
a)
Cosecant
b)
Sine
c)
Cosine
d)
Tangent
4.
Given the Cos(x) = -2/3, then the Sec(x) = ?
a)
-2/3
b)
-3/2
c)
3/2
d)
2/3
5.
Given the Csc(x) = 1, then the Sin(x) = ?
a)
1
b)
-1
c)
0
d)
Undefined
6.
Find secΘ.
a)
17/15
b)
15/17
c)
8/17
d)
17/8
7.
Find cotΘ.
a)
3/4
b)
4/3
c)
5/4
d)
5/3
8.
Find cscΘ.
a)
15/17
b)
17/15
c)
8/17
d)
17/8
9.

Write all six trig ratios.

a)

sinθ=2425 cosθ=725 tanθ=247 \sin\theta=\frac{24}{25}\ \cos\theta=\frac{7}{25}\ \tan\theta=\frac{24}{7}\   cscθ=2524 secθ=257 cotθ=724\csc\theta=\frac{25}{24}\ \sec\theta=\frac{25}{7}\ \cot\theta=\frac{7}{24}  

b)

  sinθ=725 cosθ=2425 tanθ=724\sin\theta=\frac{7}{25}\ \cos\theta=\frac{24}{25}\ \tan\theta=\frac{7}{24}   cscθ=257 secθ=2524 cotθ=247\csc\theta=\frac{25}{7}\ \sec\theta=\frac{25}{24}\ \cot\theta=\frac{24}{7}  

10.
                                                                                                                               
                                          Solve for DE
a)
36.5
b)
18.8
c)
8.5
d)
7.9
11.

In which two quadrants is inverse sine defined?

a)

Quadrant I

b)

Quadrant II

c)

Quadrant III

d)

Quadrant IV

12.

In which two quadrants is inverse cosine defined?

a)

Quadrant I

b)

Quadrant II

c)

Quadrant III

d)

Quadrant IV

13.

In which two quadrants is inverse tangent defined?

a)

Quadrant I

b)

Quadrant II

c)

Quadrant III

d)

Quadrant IV

14.

True or False: arcsin(x)\arcsin\left(x\right)   is another way to write sin1(x)\sin^{-1}\left(x\right)  .

a)

TRUE!

b)

FALSE!

15.

Evaluate the expression in RADIANS. Give your answer to the hundredths place.

sin1(0.72)=\sin^{-1}\left(0.72\right)=  

(a)  

16.

Evaluate the expression in RADIANS. Give your answer to the hundredths place.

arccos(1)=\arccos\left(1\right)=  

(a)  

17.

Evaluate the expression in RADIANS. Give your answer to the hundredths place.

cos1(0.27)=\cos^{-1}\left(-0.27\right)=  

(a)  

18.

Evaluate the expression in RADIANS. Give your answer to the hundredths place.

arctan(1.73)=\arctan\left(-1.73\right)=  

(a)  

19.

Evaluate the inverse trig function USING THE UNIT CIRCLE. Give your answer in DEGREES.

sin1(32)\sin^{-1}\left(-\frac{\sqrt[]{3}}{2}\right)  

a)

45°45\degree  

b)

300°300\degree  

c)

30°30\degree  

d)

315°315\degree  

20.

Evaluate the inverse trig function USING THE UNIT CIRCLE. Give your answer in DEGREES.

arcsin(12)=\arcsin\left(\frac{1}{2}\right)=  

a)

45°45\degree  

b)

60°60\degree  

c)

30°30\degree  

d)

90°90\degree  

21.

Evaluate the inverse trig function USING THE UNIT CIRCLE. Give your answer in DEGREES.

cos1(12)=\cos^{-1}\left(-\frac{1}{2}\right)=  

a)

240°240\degree  

b)

60°60\degree  

c)

150°150\degree  

d)

120°120\degree  

22.

Evaluate the inverse trig function USING THE UNIT CIRCLE. Give your answer in DEGREES.

arccos(22)\arccos\left(-\frac{\sqrt[]{2}}{2}\right)  

a)

180°180\degree  

b)

135°135\degree  

c)

150°150\degree  

d)

120°120\degree  

23.

Evaluate the inverse trig function USING THE UNIT CIRCLE. Give your answer in DEGREES.

arctan(3)\arctan\left(\sqrt[]{3}\right)  

a)

60°60\degree  

b)

300°300\degree  

c)

270°270\degree  

d)

30°30\degree  

24.

Evaluate the inverse trig function USING THE UNIT CIRCLE. Give your answer in DEGREES.

tan1(1)=\tan^{-1}\left(-1\right)=  

a)

45°45\degree  

b)

330°330\degree  

c)

270°270\degree  

d)

315°315\degree  

25.

Find mCm\angle C  . Give your answer in DEGREES to the hundredths place. (Note: drawing is NOT to scale).

a)

90°90\degree  

b)

68.32°68.32\degree  

c)

73.74°73.74\degree  

d)

70.48°70.48\degree  

26.

Find mTm\angle T  . Give your answer in DEGREES to the hundredths place. (Note: drawing is NOT to scale).

a)

25.22°25.22\degree  

b)

16.26°16.26\degree  

c)

73.74°73.74\degree  

d)

35.47°35.47\degree  

27.
a)
-π/3
b)
4π/3
c)
-2π/3
d)
2π/3
28.
a)
0
b)
π/2
c)
d)
29.
a)
3π/4
b)
π/4
c)
5π/4
d)
-3π/4
30.
a)
π/6
b)
5π/6
c)
7π/6
d)
31.
a)
π/2
b)
π
c)
3π/2
d)
-3π/2
32.
Evaluate the function:  arcsin(-1/2)
a)
π/3
b)
π/6
c)
5π/6
d)
-π/6
33.
arccos (-√3/2)
a)
5π/6
b)
2π/3
c)
-π/6
d)
7π/6
34.
What is tan[arccos(-1)]?
a)
undefined
b)
0
c)
½
d)
1
35.
Evaluate the function:  tan[sin-1(-1/2)]
a)
√3
b)
√3/3
c)
-√3
d)
-√3/3
36.
cos-1[tan(-π/4)] = 
a)
0
b)
π
c)
π/4
d)
3π/4
37.
What is the RANGE of angles for inverse sine?
a)
[0, π]
b)
[-1, 1]
c)
[-π/2, π/2]
d)
(-∞, ∞)
38.
What RANGE of angles for inverse cosine?
a)
[0, π]
b)
(-∞, ∞)
c)
[-π/2, π/2]
d)
[-1, 1]
39.
What is the RANGE of angles for inverse tangent?
a)
[-π/2, π/2]
b)
(-π/2, π/2)
c)
[0, π]
d)
(-∞, ∞)
40.
What is the period
of
 y = 3 sin 2x?
a)
2
b)
3
c)
180
d)
360
41.
What is the amplitude of y = 3 cos 2x?
a)
3
b)
2
c)
90
90⁰
d)
350⁰
42.

23=4cosx-2\sqrt[]{3}=-4\cos x  

a)

π6,5π6\frac{\pi}{6},\frac{5\pi}{6}  

b)

π3,5π3\frac{\pi}{3},\frac{5\pi}{3}  

c)

π6\frac{\pi}{6}  

d)

π6,  11π6\frac{\pi}{6},\ \ \frac{11\pi}{6}  

43.

secθ2=32\sec\theta-2=-\frac{3}{2}  

a)

θ=π3, 5π3\theta=\frac{\pi}{3},\ \frac{5\pi}{3}  

b)

θ=π4, 7π4\theta=\frac{\pi}{4},\ \frac{7\pi}{4}  

c)

No solution

44.

3cotx=3-3\cot x=\sqrt[]{3}  

a)

π3,  4π3\frac{\pi}{3},\ \ \frac{4\pi}{3}  

b)

2π3, 5π3\frac{2\pi}{3},\ \frac{5\pi}{3}  

c)

2π3, 4π3\frac{2\pi}{3},\ \frac{4\pi}{3}  

d)

5π6, 11π6\frac{5\pi}{6},\ \frac{11\pi}{6}  

45.

tanx=tanxsinx\tan x=\tan x\sin x  

a)

x=0, π2, πx=0,\ \frac{\pi}{2},\ \pi  

b)

x=0, πx=0,\ \pi  

c)

x=0, π2x=0,\ \frac{\pi}{2}  

d)

No solution.

46.

3csc2x=4+2csc2x3\csc^2x=4+2\csc^2x  

a)

x=7π6, 11π6x=\frac{7\pi}{6},\ \frac{11\pi}{6}  

b)

x=π6, 5π6 x=\frac{\pi}{6},\ \frac{5\pi}{6}\  

c)

x=π6, 5π6, 7π6, 11π6x=\frac{\pi}{6},\ \frac{5\pi}{6},\ \frac{7\pi}{6},\ \frac{11\pi}{6}  

d)

No solution.

47.

2cos2x=3cosx12\cos^2x=3\cos x-1  

a)

x=0, π6, 11π6x=0,\ \frac{\pi}{6},\ \frac{11\pi}{6}  

b)

x=0, π3, π, 5π3x=0,\ \frac{\pi}{3},\ \pi,\ \frac{5\pi}{3}  

c)

x=0, π3, 5π3x=0,\ \frac{\pi}{3},\ \frac{5\pi}{3}  

d)

x=2π3, π, 4π3x=\frac{2\pi}{3},\ \pi,\ \frac{4\pi}{3}  

48.

4csc2θ=4cscθ2csc2θ4-\csc^2\theta=4\csc\theta-2\csc^2\theta  

a)

x=7π6, 11π6x=\frac{7\pi}{6},\ \frac{11\pi}{6}  

b)

x=π6, 5π6, 7π6, 11π6x=\frac{\pi}{6},\ \frac{5\pi}{6},\ \frac{7\pi}{6},\ \frac{11\pi}{6}  

c)

x=π4, 3π4x=\frac{\pi}{4},\ \frac{3\pi}{4}  

d)

θ=π6, 5π6\theta=\frac{\pi}{6},\ \frac{5\pi}{6}  

49.

sec2x=2tanx\sec^2x=-2\tan x  

a)

x=π4, 5π4x=\frac{\pi}{4},\ \frac{5\pi}{4}  

b)

x=3π4, 7π4x=\frac{3\pi}{4},\ \frac{7\pi}{4}  

c)

x=3π4, 5π4x=\frac{3\pi}{4},\ \frac{5\pi}{4}  

d)

No solution.

50.

Challenge! The equation 9sinθ=39^{\sin\theta}=3  has two solutions. One of them is 30°30\degree  . Find the other one.

a)

210°210\degree  

b)

150°150\degree  

c)

60°60\degree  

d)

330°330\degree  

51.

1+2sinx=cscx1+2\sin x=\csc x  

a)

π6, 5π6, 3π2\frac{\pi}{6},\ \frac{5\pi}{6},\ \frac{3\pi}{2}  

b)

π3, 2π3, 3π2\frac{\pi}{3},\ \frac{2\pi}{3},\ \frac{3\pi}{2}  

c)

π6, π2, 5π6\frac{\pi}{6},\ \frac{\pi}{2},\ \frac{5\pi}{6}  

d)

π3, π2, 2π3 \frac{\pi}{3},\ \frac{\pi}{2},\ \frac{2\pi}{3}\  

52.

Solve each equation using a calculator. Round to the nearest hundredth.

4+3cosx=3.06+2cosx4+3\cos x=3.06+2\cos x  

a)

35.90°, 160.05° 35.90\degree,\ 160.05\degree\  

b)

199.95°199.95\degree  

c)

160.05°, 199.95°160.05\degree,\ 199.95\degree  

d)

No solution.

53.

Solve each equation using a calculator. Round to the nearest hundredth. 5+4cotθ=12.725+4\cot\theta=12.72  

a)

264.86°264.86\degree  

b)

27.39°, 207.39°27.39\degree,\ 207.39\degree  

c)

27.39°, 264.86°27.39\degree,\ 264.86\degree  

d)

No solution.

54.

Solve using a calculator. Round to the nearest degree.

3sin2x+2sinx1=03\sin^2x+2\sin x-1=0  

a)

19°, 161°, 270°19\degree,\ 161\degree,\ 270\degree  

b)

19°, 161°19\degree,\ 161\degree  

c)

19°, 270°19\degree,\ 270\degree  

d)

199°, 270°, 341°199\degree,\ 270\degree,\ 341\degree  

55.

Solve using a calculator. Round to the nearest hundredth.

sec2x+4secx=5\sec^2x+4\sec x=5  

a)

x=90°, 101.54°, 258.46°x=90\degree,\ 101.54\degree,\ 258.46\degree  

b)

x=0°, 78.46°, 101.54°x=0\degree,\ 78.46\degree,\ 101.54\degree  

c)

x=0°, 101.54°, 258.46°x=0\degree,\ 101.54\degree,\ 258.46\degree  

d)

x=0°, 101.54°x=0\degree,\ 101.54\degree  

56.

Solve using a calculator. Round your answers to the nearest hundredth. 3sinx14=24cscx3\sin x-14=24\csc x  

a)

x=228.59°, 311.41°x=228.59\degree,\ 311.41\degree  

b)

No solution.

c)

x=48.59°, 131.41°x=48.59\degree,\ 131.41\degree  

d)

x=48.59°, 311.41°x=48.59\degree,\ 311.41\degree  

57.

Solve equation for 0θ<2π0\le\theta<2\pi  .
2+cotθ=3-2+\cot\theta=-3  

a)

θ=3π4,4π3,7π4\theta=\frac{3\pi}{4},\frac{4\pi}{3},\frac{7\pi}{4}  

b)

θ=3π4,7π4\theta=\frac{3\pi}{4},\frac{7\pi}{4}  

c)

θ=π3,4π3\theta=\frac{\pi}{3},\frac{4\pi}{3}  

d)

θ=3π4,4π3\theta=\frac{3\pi}{4},\frac{4\pi}{3}  

58.

Solve equation for 0θ<2π0\le\theta<2\pi  .
1=58cosθ1=5-8\cos\theta  

a)

θ=π6,π3,11π6\theta=\frac{\pi}{6},\frac{\pi}{3},\frac{11\pi}{6}  

b)

θ=π6,11π6\theta=\frac{\pi}{6},\frac{11\pi}{6}  

c)

θ=π6\theta=\frac{\pi}{6}  

d)

θ=π3,5π3\theta=\frac{\pi}{3},\frac{5\pi}{3}  

59.

Solve equation for 0θ<2π0\le\theta<2\pi  .
2=5+3secθ-2=-5+3\sec\theta  

a)

θ=0,π3\theta=0,\frac{\pi}{3}  

b)

θ=0\theta=0  

c)

θ=π3,5π3\theta=\frac{\pi}{3},\frac{5\pi}{3}  

d)

No SolutionNo\ Solution  

60.

Solve equation for 0θ<2π0\le\theta<2\pi  .
4+4tanθ=04+4\tan\theta=0  

a)

θ=π\theta=\pi  

b)

θ=7π4\theta=\frac{7\pi}{4}  

c)

θ=3π4,7π4\theta=\frac{3\pi}{4},\frac{7\pi}{4}  

d)

θ=0,3π4\theta=0,\frac{3\pi}{4}  

61.

Solve equation for 0θ<2π0\le\theta<2\pi  .
2=43cscθ2=-4-3\csc\theta  

a)

θ=2π3,7π6\theta=\frac{2\pi}{3},\frac{7\pi}{6}  

b)

θ=π3\theta=\frac{\pi}{3}  

c)

θ=7π6,11π6\theta=\frac{7\pi}{6},\frac{11\pi}{6}  

d)

θ=2π3,7π6,11π6\theta=\frac{2\pi}{3},\frac{7\pi}{6},\frac{11\pi}{6}  

62.

Solve equation for 0θ<2π0\le\theta<2\pi  .
12sec2θ=3sec2θ-1-2\sec^2\theta=-3\sec^2\theta  

a)

θ=0,π,4π3\theta=0,\pi,\frac{4\pi}{3}  

b)

θ=0\theta=0  

c)

θ=π4,3π4,5π4,7π4\theta=\frac{\pi}{4},\frac{3\pi}{4},\frac{5\pi}{4},\frac{7\pi}{4}  

d)

θ=0,π\theta=0,\pi  

63.

Solve equation for 0θ<2π0\le\theta<2\pi  .
1+tan2θ=4tan2θ1+\tan^2\theta=4\tan^2\theta  

a)

θ=π6,5π6,7π6,11π6\theta=\frac{\pi}{6},\frac{5\pi}{6},\frac{7\pi}{6},\frac{11\pi}{6}  

b)

θ=π3,2π3,4π3,5π3\theta=\frac{\pi}{3},\frac{2\pi}{3},\frac{4\pi}{3},\frac{5\pi}{3}  

c)

θ=π6,7π6\theta=\frac{\pi}{6},\frac{7\pi}{6}  

d)

θ=π6,5π6,7π6\theta=\frac{\pi}{6},\frac{5\pi}{6},\frac{7\pi}{6}  

64.

Solve equation for 0θ<2π0\le\theta<2\pi  .
3sin2θ+4=5+sin2θ3\sin^2\theta+4=5+\sin^2\theta  

a)

θ=π4,5π4,7π4\theta=\frac{\pi}{4},\frac{5\pi}{4},\frac{7\pi}{4}  

b)

θ=π4,7π4\theta=\frac{\pi}{4},\frac{7\pi}{4}  

c)

θ=π4,3π4\theta=\frac{\pi}{4},\frac{3\pi}{4}  

d)

θ=π4,3π4,5π4,7π4\theta=\frac{\pi}{4},\frac{3\pi}{4},\frac{5\pi}{4},\frac{7\pi}{4}  

65.

Solve equation for 0θ<2π0\le\theta<2\pi  .
3=cot2θ6-3=\cot^2\theta-6  

a)

θ=π6,7π4,11π6\theta=\frac{\pi}{6},\frac{7\pi}{4},\frac{11\pi}{6}  

b)

θ=7π6,5π4,11π6\theta=\frac{7\pi}{6},\frac{5\pi}{4},\frac{11\pi}{6}  

c)

θ=π6,7π6\theta=\frac{\pi}{6},\frac{7\pi}{6}  

d)

θ=π6,5π6,7π6,11π6\theta=\frac{\pi}{6},\frac{5\pi}{6},\frac{7\pi}{6},\frac{11\pi}{6}  

66.

Solve equation for 0θ<2π0\le\theta<2\pi  .
4+csc2θ=2csc2θ4+\csc^2\theta=2\csc^2\theta  

a)

θ=5π6,4π3\theta=\frac{5\pi}{6},\frac{4\pi}{3}  

b)

θ=π6,5π6\theta=\frac{\pi}{6},\frac{5\pi}{6}  

c)

θ=π6,5π6,7π6,11π6\theta=\frac{\pi}{6},\frac{5\pi}{6},\frac{7\pi}{6},\frac{11\pi}{6}  

d)

θ=π6\theta=\frac{\pi}{6}  

67.

Solve equation for 0θ<2π0\le\theta<2\pi  .
sinθcscθ+3cscθ=2sinθ+3cscθ-\sin\theta\csc\theta+3\csc\theta=\sqrt{2}\sin\theta+3\csc\theta  

a)

θ=5π4,11π6\theta=\frac{5\pi}{4},\frac{11\pi}{6}  

b)

θ=3π4,7π6,7π4\theta=\frac{3\pi}{4},\frac{7\pi}{6},\frac{7\pi}{4}  

c)

θ=0,π,5π4,7π4\theta=0,\pi,\frac{5\pi}{4},\frac{7\pi}{4}  

d)

θ=5π4,7π4\theta=\frac{5\pi}{4},\frac{7\pi}{4}  

68.

Solve equation for 0θ<2π0\le\theta<2\pi  .
0=3sinθ2sin2θ0=-\sqrt{3}\sin\theta-2\sin^2\theta  

a)

θ=0,2π3,π,5π3\theta=0,\frac{2\pi}{3},\pi,\frac{5\pi}{3}  

b)

θ=π2,7π6,3π2,11π6\theta=\frac{\pi}{2},\frac{7\pi}{6},\frac{3\pi}{2},\frac{11\pi}{6}  

c)

θ=0,π,4π3,5π3\theta=0,\pi,\frac{4\pi}{3},\frac{5\pi}{3}  

d)

θ=0,π,5π3\theta=0,\pi,\frac{5\pi}{3}  

69.

Solve equation for 0θ<2π0\le\theta<2\pi  .
0=3cotθ+23cotθsinθ0=-3\cot\theta+2\sqrt{3}\cot\theta\sin\theta  

a)

θ=3π2\theta=\frac{3\pi}{2}  

b)

θ=0,5π6,π,11π6\theta=0,\frac{5\pi}{6},\pi,\frac{11\pi}{6}  

c)

θ=0,π2,3π2\theta=0,\frac{\pi}{2},\frac{3\pi}{2}  

d)

θ=π3,π2,2π3,3π2\theta=\frac{\pi}{3},\frac{\pi}{2},\frac{2\pi}{3},\frac{3\pi}{2}  

70.

Solve equation for 0θ<2π0\le\theta<2\pi  .
secθcscθcscθ=2secθcscθ\sec\theta\csc\theta-\csc\theta=\sqrt{2}\sec\theta-\csc\theta  

a)

θ=3π4\theta=\frac{3\pi}{4}  

b)

θ=π4,π2,3π4,3π2\theta=\frac{\pi}{4},\frac{\pi}{2},\frac{3\pi}{4},\frac{3\pi}{2}  

c)

θ=π4,3π4\theta=\frac{\pi}{4},\frac{3\pi}{4}  

d)

θ=π4\theta=\frac{\pi}{4}  

71.

Solve equation for 0θ<2π0\le\theta<2\pi  .
23secθcosθ=3secθ2\sqrt{3}\sec\theta\cos\theta=-3\sec\theta  

a)

θ=5π6\theta=\frac{5\pi}{6}  

b)

θ=5π6,7π6\theta=\frac{5\pi}{6},\frac{7\pi}{6}  

c)

θ=7π6,4π3\theta=\frac{7\pi}{6},\frac{4\pi}{3}  

d)

θ=5π6,11π6\theta=\frac{5\pi}{6},\frac{11\pi}{6}  

72.

Solve equation for 0θ<2π0\le\theta<2\pi  .
sec2θ+3=2secθ+2\sec^2\theta+3=2\sec\theta+2  

a)

θ=0,π2,2π3,5π3\theta=0,\frac{\pi}{2},\frac{2\pi}{3},\frac{5\pi}{3}  

b)

θ=π3,π,5π3\theta=\frac{\pi}{3},\pi,\frac{5\pi}{3}  

c)

θ=π4\theta=\frac{\pi}{4}  

d)

θ=0\theta=0  

73.

Solve equation for 0θ<2π0\le\theta<2\pi  .
3sin2θ=7sin2θ+4sinθ+13\sin^2\theta=7\sin^2\theta+4\sin\theta+1  

a)

θ=7π6\theta=\frac{7\pi}{6}  

b)

θ=0,π3,5π3\theta=0,\frac{\pi}{3},\frac{5\pi}{3}  

c)

θ=3π4,7π4\theta=\frac{3\pi}{4},\frac{7\pi}{4}  

d)

θ=7π6,11π6\theta=\frac{7\pi}{6},\frac{11\pi}{6}  

74.

Solve equation for 0θ<2π0\le\theta<2\pi  .
sin2θ=sinθ+13sin2θ-\sin^2\theta=\sin\theta+1-3\sin^2\theta  

a)

θ=π2,11π6\theta=\frac{\pi}{2},\frac{11\pi}{6}  

b)

θ=π2,7π6,11π6\theta=\frac{\pi}{2},\frac{7\pi}{6},\frac{11\pi}{6}  

c)

θ=2π3,7π6\theta=\frac{2\pi}{3},\frac{7\pi}{6}  

d)

θ=0,2π3,4π3\theta=0,\frac{2\pi}{3},\frac{4\pi}{3}  

75.

Solve equation for 0θ<2π0\le\theta<2\pi  .
2+3cscθ+2csc2θ=csc2θ2+3\csc\theta+2\csc^2\theta=\csc^2\theta  

a)

θ=3π2,11π6\theta=\frac{3\pi}{2},\frac{11\pi}{6}  

b)

θ=3π4,7π4\theta=\frac{3\pi}{4},\frac{7\pi}{4}  

c)

θ=7π6,3π2,11π6\theta=\frac{7\pi}{6},\frac{3\pi}{2},\frac{11\pi}{6}  

d)

θ=π4,11π6\theta=\frac{\pi}{4},\frac{11\pi}{6}  

76.

Solve equation for 0θ<2π0\le\theta<2\pi  .
4cot2θ=12cotθ+3cot2θ4\cot^2\theta=-1-2\cot\theta+3\cot^2\theta  

a)

θ=3π4,7π4\theta=\frac{3\pi}{4},\frac{7\pi}{4}  

b)

θ=7π4\theta=\frac{7\pi}{4}  

c)

θ=3π4\theta=\frac{3\pi}{4}  

d)

θ=π3,π,5π3\theta=\frac{\pi}{3},\pi,\frac{5\pi}{3}  

77.

Find the EXACT value

cos[tan1(( 3))]\cos\left[\tan^{-1}\left(\sqrt{\left(\ 3\right)}\right)\right]

78.

Find the EXACT value

sec[cos1(  32)]\sec\left[\cos^{-1}\left(\frac{\ \sqrt{\ 3}}{2}\right)\right]

79.

Find the EXACT value

sec1[sin(  π3)]\sec^{-1}\left[\sin\left(\ \frac{\ \pi}{3}\right)\right]

80.

Find the EXACT value

cot1[tan(  π2)]\cot^{-1}\left[\tan\left(\ \frac{\ \pi}{2}\right)\right]