what is the value of sin(5x)-cosx

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what is the value of sin(5x)-cosx

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k koteeswar reddy 1st Dec, 2020

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Subhrajit Mukherjee 10th Jan, 2021

Sin(5x)=cos(90-5x)

Sin(5x)-cos(x) = cos(90-5x)-cos(x) = -2 sin ([90-5x+x]/2) sin ([90-5x-x]/2) = - 2sin([90-4x]/2) sin ([90-6x]/2)

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