Question

if A=60 B=30 show that sin(A-B)=sinAcosB-cosAsinB​

Answer 1

Taking L.H.S.-sin (60-30)

sin (30)

1/2

Taking R.H.S-sin60.cos30-cos60.sin30

(3^2)/2. (3^2)/2-1/2.1/2

3/4-1/4

1/2

L. H.S proved