Question

prove that!!!

sin theta * cos ( 90 - theta ) + cos theta * sin ( 90 - theta ) = 1

Answer 1

Hii!☺

sin theta*sin theta+cos theta* cos theta
sin^2theta+ cos^2theta
1

hope it helps u✌

Answer 2

sin theta* cos theta + cos theta * sin theta=1

so,    sin^2 theta + cos^ 2 theta=1