Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 46)

Which of the following can be determined using the cosine rule?

The length of a side when you know two sides and the included angle

The angles of a triangle when you know all three sides

The area of a triangle

The length of a side when all angles are known

The cosine rule is used to find side lengths or angles of a triangle.