Math, asked by chethansamanth1ygh, 1 year ago

find the value of cos(-690°) give me the steps

Answers

Answered by Anonymous

0

cos(-690°)=cos(-720°+60°)=cos(60°)

chethansamanth1ygh: how -750°+60°=60°

Anonymous: because-720°=2*360° and cos function is periodic with period 2π=360°

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