Prove that sin(A+B) =sinAcosB +sinBcosA - Maths - Introduction to Trigonometry

Question

Prove that sin(A+B) =sinAcosB +sinBcosA

Majid Mohammed · Answer

Sin( A+B)= 1
rhs = sinAcosB + sinBcosA
= sinAsinA + cosAcosA
=sin2A + Cos2A
= 1
proved