Which of the following options gives an expression equivalent to sin (A + B)?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. sinAcosB + cosAsinB.
sin(A + B) = sin A cos B + cos A sin B
cos(A − B) = cosA cosB + sinA sinB
sin(A - B) = sinA cosB - cosA sinB