How do I know which sides are the Adjacent, Opposite and Hypotenuse for trigonometry?

The hypotenuse is the easiest to spot - it's always the longest side, and it's across from the right angle in the triangle. This leaves two others: the adjacent side is the side that is next to the acute angle the question is concerned with, and the opposite side is the side that's literally opposite that angle.

Answered by Ted O. Maths tutor

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