Precalculus Examples

$\sin (\frac{π}{15}) \cos (\frac{4 π}{15}) + \cos (\frac{π}{15}) \sin (\frac{4 π}{15})$

Step 1

The result can be shown in multiple forms.

Exact Form:

$\sin (\frac{π}{15}) \cos (\frac{4 π}{15}) + \cos (\frac{π}{15}) \sin (\frac{4 π}{15})$

Decimal Form:

$0.86602540 \dots$