.

Asked by Krishna62 | 7th Sep, 2019, 06:50: PM

Expert Answer:

sin (45° + A) + sin (45° - A)
= sin 45° cos A + cos 45° sin A + sin 45° cos A - cos 45° sin A 
= 2sin 45° cos A
= 2 × 1/√2 cos A
= √2 cos A
 
Hence,
sin (45° + A) + sin (45° - A) = √2 cos A

Answered by Sneha shidid | 9th Sep, 2019, 09:56: AM