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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
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