Verify the identity.
sin (x + y) - sin (x - y) = 2 cos x sin y

Step-by-step explanation:

Sin (x + y) = sin x cos y + sin y cos x

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step-by-step explanation:

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540