Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 5 - No. 30)
What is the formula for area of triangle, if you know only two sides and one angle?
1/2 * a * b * sin C
a * b * sin C
1/2 * a * b
a * b * cos C
Explication
Area = 1/2 * ab * sin C