Question

sin A cos (90°-A) + cos A sin (90°-A)

Answer 1

sin A sin A + cos A cos A

= (1) (1)

= 1

hope this helps you....

Answer 2

Step-by-step explanation:

sina cos (90-a)+cos a sin(90-a)=

Sina Sina + cosa cosa=

2sina+2cosa=

2(Sina+cosa)

as cos (90-a) is Sina and sin(90-a) is cosa hope it is write answer