Math, asked by redkargauri, 2 months ago

Please solve this question. no spamming.

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Answered by ananya2277

2

Cos35°+Cos85°+Cos155°

=> Cos(60-25)+Cos(60+25)+Cos155

=> 2Cos60.Cos25+Cos(180-25)

=> 2*1/2 Cos25-Cos25

=> Cos25-Cos25

=> 0

Answer !!!

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