sin 2A + sin 5A - sin A/
cos 2A +cos5A + COSA
=tan 2A
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Step-by-step explanation: (sin5a-sina)+sin2a/(cos5a+cosa)+cos2a. =2cos3asin2a+sin2a/2cos3acos2a+cos2a. =sin2a(2cos3a+1)/cos2a(2cos3a+1).
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