Question

If (1+cosθ)(1-cosθ) cosec^2θ=k, find the value of k.

Answer 1

yo!
its easy

=> (1+cosα)(1-cosα)cosec^2α=k
=> (1-cos^2α)cosec^2α=k
=>sin^2α*cosec^2α=k
=>sin^2α*1/sin^2α=k
=>k=1

hope it helps uh!