Prove by vector method that sin(A-B)=sinAcosB-cosAsinB and sin(A+B)=sinAcosB+cosAsinB

Prove by vector method that cos(A+B)=cos A cos B-sin A sin B

Prove by vector method that cos(A+B)cos A cos B-sin A sin B

Using vector, prove that sin(A+B)=sinAcosB+cosAsinB

Prove by vector methods. cos(A- B) = cos A cos B + sin A sin B.

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

If A=B=45^(@) , show that : sin(A-B)=sinAcosB-cosAsinB

Prove that sin (A+B)= sin A cos B + cos A sin B.

Prove that : sin(A- B) = sin A cos B -cos A sin B .

Prove that: (sin(A-B))/(sinAsinB)=(sinAcosB-cosAsinB)/(sinAsinB) (sinAcosB)/(sinAsinB)-(cosAsinB)/(sinCsinA) =cotB-cotA-cotC =0 = RHS Hence Proved.