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trignomentory

Asked by 13th February 2009, 9:29 PM
Answered by Expert
Answer:

Note that 25 + 65=90

So,

 they are complementary angles.

So ,

 sin(25)=cos(65)

 and cos (25)=sin(65)

So,

 the expression becomes,

Answered by Expert 14th February 2009, 6:35 PM
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