Question

Prove the following identity. Show all steps clearly. the ----- indicates that it is a fraction.

L.S
cos2x sin(pi+x)
----------------------- x --------------
1/secx + 1/cscx tan x

R.S

(secx - cscx) * cscx/sec^2x * (1-cos^2x)

Thank you

Answer 1

the top line for L.S is supposed to be
(cos2x/(1/secx + 1/cscx)) * (sin(pi+x)/tan x)

Answer 2

did you see this:
https://www.jiskha.com/questions/1829582/prove-the-identity-of-the-following-equation-cos-2x-1-cos-x-sin-pi-x-tan-x