Question

X=3sin square a,y=3cossquare a+3,find x+y

Answer 1

From question,

x+y = 3 (sin a)^2 + 3 (cos a)^2+3

= 3[ sin square a + cos square a] + 3

= 3(1) + 3 ( since sin square theta+ cos square theta = 1, identity)

= 6

Hope you have understood.