Math, asked by AbhishekSawant, 1 year ago

cos27°+cos93°+cos147°=0

Answers

Answered by profswh

1

cos27 +cos93+cos147
=2cos60cos33+cos147
=cos33+cos147
=2cos90cos57=0

AbhishekSawant: i have to solve it without using trignometric tables

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