What is the cosine of an angle?

The cosine of an angle is the ratio of the adjacent side to the hypotenuse in a right triangle, or the x-coordinate of the point on the unit circle.

Why do I need to choose between degrees and radians?

The Math.cos function in JavaScript uses radians. So, if you enter the angle in degrees, the calculator converts it to radians before calculating the cosine.

What are some common cosine values?

Some common cosine values are: cos(0) = 1, cos(π/6) ≈ 0.866, cos(π/4) ≈ 0.707, cos(π/3) = 0.5, cos(π/2) = 0.

What is the cosine of an angle?

The cosine of an angle is the ratio of the adjacent side to the hypotenuse in a right triangle, or the x-coordinate of the point on the unit circle.

Why do I need to choose between degrees and radians?

The Math.cos function in JavaScript uses radians. So, if you enter the angle in degrees, the calculator converts it to radians before calculating the cosine.

What are some common cosine values?

Some common cosine values are: cos(0) = 1, cos(π/6) ≈ 0.866, cos(π/4) ≈ 0.707, cos(π/3) = 0.5, cos(π/2) = 0.

Cosine Calculator

The Cosine Calculator is a tool that calculates the cosine of an angle, whether given i...

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Angle

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Result

Output will appear here…

How to Use This Tool

Open the Cosine Calculator and find the main field: Input.
Type your values in that field. The placeholder shows an example format (Enter input...).
Click "Run" to compute the result in your browser.
Read the result in the Result section. Use Copy to paste the output elsewhere.

Learn More About Cosine Calculator

Understanding Cosine

The cosine of an angle in a right triangle is the ratio of the length of the adjacent side to the length of the hypotenuse. In a unit circle, the cosine of an angle is the x-coordinate of the point where the terminal side of the angle intersects the circle.

Radians vs. Degrees

Angles can be measured in degrees or radians. A full circle is 360 degrees or 2π radians. The conversion is: radians = degrees * (π / 180).

About

The Cosine Calculator is a tool that calculates the cosine of an angle, whether given in degrees or radians. The cosine function is a fundamental trigonometric function used in various fields like mathematics, physics, and engineering. This calculator makes it simple to compute cosine values for both educational and professional purposes.

Examples