Question

sin A cos (90°-A)+ cos A sin (90°-A)

Answer 1

Answer:

1

Step-by-step explanation:

sinA×sinA+cosA×cosA

= 1

Answer 2

Answer:

Hey mate welcome to the answer.

As we know , cos (90°- A) =sin Aand

sin (90°- A) =cos A.

So,

It will be

sin A sin A + cos A cos A

= sin2 A + cos2 A

But ,

sin2 A + cos2 A = 1

Hence , it will be 1.

Hope it helps u.

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