Math Doubts

$\sin{(A+B)}$ formula


$\sin{(A+B)}$ $\,=\,$ $\sin{A}\cos{B}$ $+$ $\cos{A}\sin{B}$


$A$ and $B$ are two angles and the sum of them is written as $A+B$. Sine of sum of angles $A$ and $B$ is written as $\sin{(A+B)}$ in trigonometric mathematics. The $\sin{(A+B)}$ identity is used as a trigonometric formula and it is mainly used to expand in terms of sine and cosines of angles $A$ and $B$.


Learn how to derive sin of sum of angles in geometrical method.

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