Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 12)
Which trigonometric ratio is defined as Adjacent/Hypotenuse?
Sine
Cosine
Tangent
Cosecant
Explanation
The cosine function is defined as the ratio of the length of the side adjacent to an angle to the length of the hypotenuse.
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