Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 3 - No. 45)
Which of the following describes the term 'adjacent' when using trigonometry?
The side opposite the angle you're working with.
The longest side of the triangle.
The side next to the angle, that isn't the hypotenuse.
The angle itself.
Explication
The adjacent is next to the angle, not the hypotenuse