Math, asked by ianpaul4587, 1 year ago

3Cos(x - 120) +3cos x + 3cos (x + 120)= 3/4 cos3x

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Answered by revina64

0

4cosx-360cos+3cosx+3cosx+360cos=3/4cosx

4cosx+3cosx+3cosx=3/4cosx

4cosx+6cosx=3/4cosx

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