Question

sin (90-theata)cos theata+cos(90-theata)sin theata =​

Answer 1

sin(90-theta)=cos theta
also,cos(90-theta)=sin theta
therefore it will be cos square theta+sin square theta=1
therefore it equals to 1

Answer 2

Answer:

Step-by-step explanation:

Sin (90 - theta) = Cos theta

Cos( 90 - theta) = Sin theta

Cos theta×Cos theta+ Sin theta × Sin theta

= Cos 2 + Sin 2 = 1