Question

Which of the following are trigonometric identities? Check all that apply.

A. 4cosx sinx = 2cosx + 1 - 2sinx
B. cscx-sinx/cscx=cos^2x
C. tanx cosx cscx = 1
D. 1+cotxtany=sin(x+y)/sinxcosy

Answer 1

i would say none of the above

Answer 2

i know C is right but idk about the rest

Answer 3

well C is the only one where the LHS = RHS

if that's what you're asking?

Answer 4

but i wouldnt call that a trig identity