Math, asked by shahil68, 1 year ago

sinAsin2a+sin3Asin6A-sin4Asin5a=0

Answers

Answered by Bhavanavindamuri
4
нєу мαтє!! ^_^


нєяє ιѕ уσυя αиѕωєя fσя уσυя qυєѕтισи;)


qυєѕтισи:




αиѕωєя:

Given;


SinAsin2A+sin3Asin6A-sin4Asin5A


= ½(cos(2A-A) - cos(2A+A)) + ½(cos(6A-3A) - cos(6A+3A)) - ½(cos(5A-4A) - cos(5A+4A))


= ½cosA - ½cos3A +½cos3A - ½cos9A - ½cosA + ½cos9A  


=0

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