Math, asked by Jessey2109, 10 months ago

sin 2a+sin 5a-sin a/cos 2a+cos 5a+cos a=tan 2a

Answers

Answered by sandy1816

14

Step-by-step explanation:

(sin5a-sina)+sin2a/(cos5a+cosa)+cos2a

=2cos3asin2a+sin2a/2cos3acos2a+cos2a

=sin2a(2cos3a+1)/cos2a(2cos3a+1)

=sin2a/cos2a

=tan2a

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