Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 1 - No. 23)
For a triangle, given the area and two sides, which trigonometric function should be used to determine the angle?
Sine
Cosine
Tangent
Cosecant
解释
The formula for the area of a triangle using sine is 1/2 * ab * sinC, where a and b are sides and C is the angle.