Trigonometry Examples

$\sin (- \frac{4}{3}) \cos (\frac{12}{5}) - \cos (\frac{4}{3}) \sin (\frac{12}{5})$

Step 1

Since $\sin (- \frac{4}{3})$ is an odd function, rewrite $\sin (- \frac{4}{3})$ as $- \sin (\frac{4}{3})$ .

$- \sin (\frac{4}{3}) \cos (\frac{12}{5}) - \cos (\frac{4}{3}) \sin (\frac{12}{5})$

Step 2

The result can be shown in multiple forms.

Exact Form:

$- \sin (\frac{4}{3}) \cos (\frac{12}{5}) - \cos (\frac{4}{3}) \sin (\frac{12}{5})$

Decimal Form:

$0.55780658 \dots$