# Applications of the Sine Rule

## Interactive practice questions

Consider the given triangle.

a

First, find the value of $\angle BAC$BAC.

b

Find the length of $c$c.

Easy
Approx 3 minutes
Use the sine rule to prove that the area of $\triangle ABC$ABC is given by the equation $Area=\frac{a^2\sin B\sin C}{2\sin A}$Area=a2sinBsinC2sinA.