(cosa -cos3a) (sin 8a+sin 2a)/
(sin 5a-sina )(cos4a -cos 6a)
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(sin 5a-sina )(cos4a -cos 6a)
(cosa -cos3a) (sin 8a+sin 2a)/
(sin 5a-sina )(cos4a -cos 6a)
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Sin 5a/Sin 2aMark me as a brainlist