Sin'2(180°-x)+sin'2(270°-x)

Question

Sin'2(180°-x)+sin'2(270°-x)

Answer 1

Sin ^ 2 ( 180 - x) = sin ^2 ( x)
sin ^2 (270 - x) = cos^2 (x)
sin^2(x) + cos^2(x) =1