integration cos 2x - cos 2a/
sin x-sin a dx
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Step-by-step explanation:
(cos2x - cos2a) /(sinx-sina)
=(1-2sin²x -1+2sin²a) /(sinx-sina)
=2(sin²a - sin²x) /(sinx-sina)
=-2(sin²x - sin²a) / (sinx-sina)
=-2(sinx-sina) (sinx+sina) / (sinx-sina)
=-2(sinx+sina)
=> integration of equation
=> -2(-cosx) +2sina(x)
=> 2(cosx+xsina)
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