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cos2+sin2=?

NARESH , 10 Years ago
Grade 11
anser 2 Answers
Vijay Mukati
Dear Student,

Please write the question clearly.

Thanks.
Last Activity: 10 Years ago
arun
see i think you want to simlify \sin 2+\cos2
now, \sin 2+\cos2 = \sin2 + \cos(90-88)
\Rightarrow \sin 2+\cos2 = \sin2 + \sin88
\Rightarrow \sin 2+\cos2 = 2\sin(\frac{88+2}{2})\cos(\frac{88-2}{2})
\Rightarrow \sin 2+\cos2 = 2\sin(45)\cos(43)
\Rightarrow \sin 2+\cos2 = \sqrt{2}\cos(43) 
here is your answer that sin2 + cos2 = (square root of 2) cos43
you ask me if your question was different, there is any mistake in my answer or there is any doubt related to this question
Last Activity: 10 Years ago
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