Cosine (cos) Calculator
MathCalculate the cosine of an angle in degrees or radians.
cos(angle)
The cosine of the given angle.
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Odeh Ahwal0people find this calculator helpful
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Saved
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Frequently Asked Questions
What is cosine?
In a right triangle, cosine is the ratio of the length of the side adjacent to an angle to the length of the hypotenuse. On the unit circle, cosine equals the x-coordinate of the point at that angle.
What range does cosine output fall in?
Cosine always produces a value between -1 and 1, the same range as sine, since it also represents a coordinate on the unit circle.
How is cosine related to sine?
Cosine is sine shifted by 90 degrees: cos(angle) = sin(angle + 90deg). They trace the same wave shape, just offset from each other.
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