Consider the given triangle.
First, find the value of $\angle BAC$∠BAC.
Find the length of $c$c.
Round your answer to two decimal places.
Consider the following diagram:
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.
We want to prove that the area of a parallelogram is the product of two adjacent sides and the sine of the included angle.