Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 7)
What is the primary use of the Cosine Rule?
Finding the area of a triangle.
Relating side lengths and angles in non-right triangles.
Finding the measure of the altitude of the triangle.
Relating the 3 angles in a triangle
ব্যাখ্যা
Used to find lengths and angles.