Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 1 - No. 26)

What is the purpose of the 'sine' function in the context of trigonometry?

To relate angles to side lengths in a right triangle.

To calculate the area of a triangle.

To find the hypotenuse.

To find the square root of a number.

The sine function relates angles to side lengths in a right triangle.