# CBSE Class 11-science Answered

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Asked by Krishna62 | 07 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 | 09 Sep, 2019, 09:56: AM

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