Trigonometry Examples

$\sin (x + y)$

Step 1

Use the sum formula for sine to simplify the expression. The formula states that $\sin (A + B) = \sin (A) \cos (B) + \cos (A) \sin (B)$ .

$\sin (x) \cos (y) + \cos (x) \sin (y)$

Step 2

Remove parentheses.

$\sin (x) \cos (y) + \cos (x) \sin (y)$