Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 32)
If in a triangle, a = 16cm, b = 10cm, and C = 150 degrees, which formula should you use to find the area?
Area = 1/2 * ab * sinC
Area = base * height
Cosine Rule
Sine Rule
Explicação
Area = 1/2 * ab * sinC is the correct formula to use given two sides and the included angle.