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Question

Evaluate sin250cos650+cos250sin650


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Solution

To evaluate:sin250cos650+cos250sin650

Applying identity sin(A+B)=sinAcosB+cosAsinB, we get

sin250cos650+cos250sin650=sin(250+650)

=sin900

=1

Thus, the required value of sin250cos650+cos250sin650=1.


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