SOLUTION: Which of the following is a trigonometric identity? a. cot θ + tan θ = 1 b. sec^2 θ + csc^2 θ = 1 c. tan^2 θ = sin^2 θ x sec^2 θ d. cos^2

Algebra ->  Trigonometry-basics -> SOLUTION: Which of the following is a trigonometric identity? a. cot θ + tan θ = 1 b. sec^2 θ + csc^2 θ = 1 c. tan^2 θ = sin^2 θ x sec^2 θ d. cos^2      Log On


   



Question 1014809: Which of the following is a trigonometric identity?
a. cot θ + tan θ = 1
b. sec^2 θ + csc^2 θ = 1
c. tan^2 θ = sin^2 θ x sec^2 θ
d. cos^2 θ = sec^2 θ x tan^2 θ
Thanks

Found 2 solutions by ikleyn, fractalier:
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
.
c.) is an identity.

Others are not.


Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Just answered this one. Choice C.