(Solved): Verify the identity. sin()sin(+)=sin2sin2 Write the left side of the identity us ...

Verify the identity. $$\sin (???)\sin (?+?)={\sin }^2??{\sin }^2?$$ Write the left side of the identity using the sum and difference formula. $$(\sin ?\cos ??\cos ?\sin ?)(\sin ?\cos ?+\cos ?\sin ?)$$ (Type the terms of your expression in the same order as they appear in the original expression.) Use the distributive property to simplify the expression from the previous step. (Simplify your answer.)