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 1014836: 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 fractalier, ikleyn:
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Since sec^2 x = 1/cos^2 x, choice C is an identity.

Answer by ikleyn(52797) About Me  (Show Source):