Free Printable Trig Identities Formulas

1.

Csc x =

a)

1 + tan x

b)

$\frac{1}{\sin x}$

c)

$\frac{1}{\cos\ x}$

d)

$\frac{r}{x}$

2.

$\tan^2x$

a)

$1+\sec^2x$

b)

$1-\sec^2x$

c)

$\sec^2x\ -1$

d)

$\frac{\cos^2x}{\sin^2x}$

3.

$\cos^2x=$

a)

$1+\sin^2x$

b)

$\sin^2x\ -1$

c)

$1-\sin^2x$

d)

$\frac{1}{\sec^2x}$

e)

$\frac{1}{\csc^2x}$

4.

sin(a + b)

a)

sin a sin b + cos a cos b

b)

sin a sin b - cos a cos b

c)

sin a cos b + cos a sin b

d)

sin a cos b - cos a sin b

5.

cos (a - b)

a)

cos a cos b + sin a sin b

b)

cos a cos b - sin a sin b

c)

cos a sin b - sin a cos b

d)

cos a sin b + sin a cos b

6.

$\tan\ \left(a-b\right)=$

a)

$\frac{\tan a-\tan\ b}{1+\tan a\tan b}$

b)

$\frac{\tan a+\tan b}{1+\tan a\tan b}$

c)

$\frac{\tan a-\tan b}{1-\tan a\tan b}$

d)

$\frac{\tan a+\tan b}{1-\tan a\tan b}$

7.

$\cos\ ^2x=$

a)

(1 + sinx)(1 - sinx)

b)

$1-\sin^2x$

c)

$\sin^2x-1$

d)

$1\ +\ \tan^2x$

8.

IN FINDING THE EXACT VALUE OF COS (165) WHICH FROMULA WOULD BE BETTER TO USE?

a)

SUM

b)

DIFFERENCE

c)

HALF ANGLE

d)

ANY OF THE ABOVE

9.

Please select the correct solution
cos²x + sin ²x=

a)

1

b)

csc²x + sec²x

c)

sin²x

d)

1 - sin²x

10.

Please select the correct solution

a)

csc x

b)

sec x

c)

cot x

d)

tan x

Trig Identities Formulas

Total questions: 10

Worksheet time: 6mins

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