Why are the trigonometric functions sometimes called circular functions?

jazzcutie0h 2021-11-17 Answered
Why are the trigonometric functions sometimes called circular functions?
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mylouscrapza
Answered 2021-11-18 Author has 22 answers

Trigonometric functions are called circular functions because function values can be expressed in terms of coordinates of a point on a unit circle.
These trignometric functions are called circular functions because radian measures of angles are determined by the lengths of arcs of circles.
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The sine and cosine function are defined as the coordinates of a point P on a circle of radius 1.
x=cosθ and y=sinθ.
Hence, trigonometric functions are called circular functions because function values can be expressed in terms of coordinates of a point on a unit circle.
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