Question

If sides A and B of a triangle have lengths of 12 and 3 respectively, and the angle between them is `(7pi)/8`, then what is the area of the triangle?

Answer 1

This can be solved using the sine rule!

Explanation:

The sine rule is used to find the area of the triangle

`"area" = 1/2(a)(b)sinC`

Angle `C` has to be expressed in degrees, by multiplying `(7pi)/8` by `180^@/pi`

In this case, you have

`"area" = 1/2(12)(3)(sin157.5^@)`