pls answer this with whole process
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ans is 1/2...check this attachment
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kmb:
actually the answer should be 1/2 cos^2 theeta
could u pls check once
ok i'm trying...
is it cos2 theeta r cos square 2 theeta
cos square theeta
ok i tell u
no sis...u r right
that is cos2theeta
thanq so much for the ans
ok..
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