If cos(90 - A ) = 0 then sin( A + B ) =

Asked by arunpattu22 | 11th Jun, 2021, 11:21: AM

Expert Answer:

cos(90 - A ) = 0
sin A = 0
A = 0
 

sin(A + B)= sin A * cos B + cos A * sin B

= 0 * cos B + cos A * sin B

= cos A * sin B

= cos 0° * sin B

= 1 * sin B

= sin B

Answered by Arun | 15th Jun, 2021, 10:31: AM