Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 5 - No. 12)
If you are given two sides of a triangle and the angle *not* included between them, which trigonometric rule should be applied?
The Cosine Rule
The Sine Rule
Pythagorean Theorem
None of the above
Giải thích
The Sine Rule is used in such cases.