Which trigonometric function is used to find the angle if the length of the hypotenuse and of the adjacent side are known?
The trigonometric function that is used to find the angle if the length of the hypotenuse and length of the adjacent side are known.
Answer to Problem 1RQ
Cosine functionis used to find the angle if the length of the hypotenuse and length of the adjacent side are known.
Explanation of Solution
In the figure above,
A: Side opposite to angle X, adjacent to angle Y
B: Side opposite to angle Y, adjacent to angle X
Hence,
Hypotenuse, side A and angle Y are related as : cos Y = side A/Hypotenuse
Hypotenuse, side B and angle X are related as : cos X = side B/Hypotenuse
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