Question

Pleaseeee help with this question prove (1-cos^2A)csc^2A=1

Answer 1

For all x,

sin²(x) + cos²(x) = 1

so we have

(1 - cos²A) csc²A = sin²A csc²A

and since csc(x) = 1 / sin(x), so the expression reduces to 1.