1. The Sine Rule can be used to find an unknown angle or length depending on the given conditions. \

Question

1. The Sine Rule can be used to find an unknown angle or length depending on the given conditions.

$\begin{align} & \frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C} \\ & \\ & \frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c} \\ \end{align}$

2. Conditions to use Sine Rule:

• Non right-angled triangle

• When given $2$ angles and $1$ side

• When given $2$ sides and $1$ non-included angle

Accepted Answer

$\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}$

Sine Rule