do no how to answer this hard one

Question

If we know the values of the sine and cosine of x and y, we can find the value of

sin(x − y)

by using the 1---Select---AdditionMultiplicationSubtractionDivision Formula for Sine.

State the formula.

sin(x − y) =

 

Answer 1

The trigonometric expression is .

Rewrite the expression is

Addition formula for trigonometric identity: .

Fundamental identities: and .

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