Question

Sin (90 - 0) x Cose + Cos( 90 - 0) x Sino​

Answer 1

$\qquad\sf{:}\longrightarrow sin(90-\theta)×cos\theta+cos(90-\theta)×sin\theta$

$\qquad\sf{:}\longrightarrow cos\theta×cos\theta+sin\theta×sin\theta$

$\qquad\sf{:}\longrightarrow cos^2\theta+sin^2\theta$

$\qquad\sf{:}\longrightarrow 1$