Question

Cos2A/1-sin2A=Cot(45-A)

Answer 1

Answer:

Hello users..

We have to prove that

Cos2A/1+sin2A=tan(1/4-A)

Solution:

As shown in attachment...

Formula used:

Cos 2x = cos?x-sin?x

Sin?x +cos?x=1

Sin 2x 2sin x cos x

And

(1-tan x)/(1+tan x) tan (11/4 -x)

Hope it helps

Step-by-step explanation:

mark the brainliest..