Question

If cotθ=1/√3 then find the value of (1-cos²θ)/(1+cos²θ)​

Answer 1

cot = 1/√3

thus, by pythagoras theorem, cos = 1/2

(1-cos²) = 1-1/4 = 3/4

(1+cos²) = 1+1/4 = 5/4

thus, 3/4*4/5 = 3/5