# If sides A and B of a triangle have lengths of 3 and 5 respectively, and the angle between them is (pi)/3, then what is the area of the triangle?

The area of the triangle is $\frac{15 \cdot \sqrt{3}}{4}$
The area of a triangle is equal to $\frac{1}{2} b c \sin a$ where $b$ and $c$ are the lengths of sides, and $a$ is the angle in between.