Question

If x=cosecA+cosA and y=cosecA-cosA then prove that (2/x+y) the whole square +(x-y/2) the whole square=1

Answer 1

I hope this may help you............

Answer 2

(2/x+y)^2+(x-y/2)^2
(2/2cosecA)^2+(2cosA/2)^2
(1/cosecA)^2+(cosA)^2
we know that 1/cosecA=sinA
(sinA)^2+(cosA)^2
1