Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 5)

What does the angle 'C' represent in the area of triangle formula: Area = 1/2 * ab * sin C?

Any angle in the triangle

The right angle

The angle between sides a and b.

The angle opposite of the longest side

The angle C has to be between a and b