Given that sin(A+B)=sin AcosB +cosA sinB, find value of sin75 degree
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Sin(45+30)=sin45.cos30+cos45. sin30
=1/square root 2.1/2+square root 3/2.1/2
=1/2square root 2+square root3/2square root 2
=square root 3+1/2square root 2
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