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CosA + cos2^A=1 then sin2^A +sin4^=1 …

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CosA + cos2^A=1 then sin2^A +sin4^=1 proof

Posted by Sparsh Bansal 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 6 years, 10 months ago

Since cos A + cos²A=1

Now,cosA= 1-cos²A=sin²A

Then taking L.H.S. sin²A+sin⁴A

=Sin²A(1+sin²A)

=CosA(1+cosA)

CosA+cos²A=1(given)

L.H.S =1 Hence proved

5Thank You

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CBSE > Class 10 > Mathematics