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Sin 2A + sin 5A-sin A÷ cos A + cos 2A + cos 5A ​
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5 votes
Sin 2A + sin 5A-sin A÷
cos A + cos 2A + cos 5A
​

User Namal
by
4.9k points

1 Answer

5 votes

Answer:

Explanation:

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

=2cos3asin2a+sin2a/2cos3acos2a+cos2a

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

=sin2a/cos2a

=tan2a

User ClementWalter
by
6.4k points
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