Question

Sin(a-b)-sin(a+b)=??​

Answer 1

Ответ:

-2cos(a) * sin(b).............

Answer 2

To simplify the expression $\sin(a - b) - \sin(a + b)$, you can use the trigonometric identity for the difference of sines:

$\sin(x - y) - \sin(x + y) = 2\sin(x)\cos(y)$.

In your expression, $x = a$ and $y = b$, so:

$\sin(a - b) - \sin(a + b) = 2\sin(a)\cos(b)$.

So, $\sin(a - b) - \sin(a + b) = 2\sin(a)\cos(b)$.