Question

if cosA= 2x/1+x^2 then tanA​

Answer 1

Answer:

CosA =2x/1+x²

CosA=adj/hyp

TanA= opp/adj

From right angle triangle

(adj) ²+(opp)²=(hyp)²

(2x)²+(opp)²=(1+x²) ²

(opp)²=1+x⁴+2x²-4x²

Opp= Square root of 1+x⁴-2x²

Opp=square root of (1-x²)²

Opp=1-x²

TanA=1-x²/2x