
Trigonometric Identities and Equations
Interactive Video
•
Mathematics
•
9th - 10th Grade
•
Practice Problem
•
Hard
Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the degree equivalent of Pi/10?
18 degrees
45 degrees
9 degrees
36 degrees
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which property is used to relate sin(90-x) to cos(x)?
Double angle formula
Triple angle formula
Complementary angle property
Pythagorean identity
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the angle 5a decomposed in the problem?
As 5a + 0
As 2a + 3a
As 4a + a
As 3a + 2a
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the double angle formula for sin(2a)?
sin(a) + cos(a)
2 sin(a) cos(a)
4 cos^3(a) - 3 cos(a)
sin^2(a) + cos^2(a)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which identity is used to express cos^2(a) in terms of sin^2(a)?
cos^2(a) = 1 + sin^2(a)
cos^2(a) = 1 - sin^2(a)
cos^2(a) = sin^2(a) - 1
cos^2(a) = 2sin(a)cos(a)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of simplifying the equation 2 sin(a) = 4 - 4 sin^2(a) + 3?
2 sin(a) = 1 + 4 sin^2(a)
2 sin(a) = 4 + 4 sin^2(a)
2 sin(a) = 4 sin^2(a) - 1
2 sin(a) = 1 - 4 sin^2(a)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the quadratic formula used to solve for sin(a)?
b^2 - 4ac
(-b ± √(b^2 - 4ac)) / 2a
a^2 + b^2 = c^2
sin^2(a) + cos^2(a) = 1
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