How do you prove sin (A + B) ×sin (A -B) = sin2A - sin2B ?

1.	How do you prove sin (A + B) ×sin (A -B) = sin2A - sin2B ?
Answer» sin (A + B) ×sin (A -B) = sin²A - sin²B The above expression can be proved by using algebraic identity as well as trigonometric identity.

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