Sample question
Question
Calculate the area of triangle ABC.
\(Area = \frac{1}{2} \times ac \times sinB\)
\(Area = 0.5 \times 8 \times 5 \times sin (130^\circ)\)
\(Area = 15.3{cm^2}(to\,1\,d.p.)\)
Calculating the area of a triangle using trigonometrySample question
Trigonometry can be used to find the area of a triangle when you know the length of two sides and the included angle.
Part of MathsTrigonometric skills