Question

sin (A + B) sin (A - B) =
sinA.sin A - sinB.sinB​

Answer 1

Answer:

0

Step-by-step explanation:

sin a *sin a it will cancel - sin b* sin b it will cancel . If we cancel we want to take 1 . this way also second step. And we come 1*1=1 .This way also second and comesb1-1=0.