Question

If cos (900
-A)=0, then Sin (A+B)=​

Answer 1

Answer:

Answers is B .

Thank you .

Hope it is helpful .

Answer 2

SOLUTION

GIVEN

cos ( 90° - A ) = 0

TO DETERMINE

The value of sin ( A + B )

EVALUATION

Here it is given that

cos ( 90° - A ) = 0

⇒ sin A = 0

⇒ A = 0°

Now

sin ( A + B )

= sin ( 0 + B )

= sin B

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