Using the formula of `sin(A-B)=sinAcosB-cosAsinB` find the value of sin`15^@`

Using the formula of sin(A-B)=sin A cos B-cos A sin B find the value of sin15^(@)

Find the value of sin15^(@)

Using the formula cos (A+B) = cosA cosB -sin A sin B . find the value of sin 15^(@) .

Given that sin(A+B)=sin A cos B+cos A sin B, find the value of sin75o.

What is the value of sin 15^(@) ?

If sin(A-B)=sinAcosB-cosAsinB , then sin15^(@) will be

Using the formula, sinA=sqrt((1-cos2A)/(2)) , find the value of sin30^(@) , it being given that cos60^(@)=(1)/(2) .

Using the fact: sin(A+B)=sin A cos B=cos A sin B and the technique of differentiation,obtain the sum formula for cosines.