100% Trigonometric Sum Identities Assignment

What is the exact value of sin 170⁰ cos 55⁰ + cos 170⁰ sin 55⁰?

-sqrt 2/2

Bob is verifying the identity, sin(3pi/2+x) = -cosx. He took these steps: He made a mistake at which step? Step

1

Choose from the drop-down menus to match the trigonometric expression with its value.

1 0.5 0

Find the exact value of cos(a + B), given sin a = 2/5 for a in Quadrant II and cos B = 1/3 for B in Quadrant IV.

4 sqrt 2 - sqrt 21/15

Given: A. sin(x) B. cos(x) C. cos(y) D. sin(y) Use the drop-down menus in the derivation of the cosine sum identity: sin(x + y)...

C D

Given: A. sin(x) B. cos(x) C. cos(y) D. sin(y) Use the drop-down menus in the derivation of the sine sum identity: cos(x + y)...

D B

The work shown is a way to derive What expressions go in the derivation of the tangent sum identity in place of A, B, and C? A: B: C:

cos x cos y tan y

Choose the correct pair of expressions to complete the solution of ...

sin x, -1

What is the exact value of cos 7pi/12?

sqrt 2 - sqrt 6/4

What is the exact value of sin 165⁰?

sqrt 6 - sqrt 2/4