Cosine Calculator

Use our free cosine calculator to find the cosine (cos) of any angle. Supports degrees and radians.

Math

Angle (θ)

Angle Unit

Formula

Cosine is a trigonometric function that relates an angle of a right triangle to the ratio of the adjacent side to the hypotenuse.

cos(θ) = adjacent / hypotenuse

Percentage: The percentage value you want to apply

Number: The original number or value

Result: The calculated result

How It Works

1Enter the angle value.
2Choose degrees or radians.
3Click Calculate to get cos(θ).

Examples

cos(60°)

1.θ=60°
2.cos(60°) = 0.5

Result: 0.5000000000

cos(0 rad)

1.θ=0 rad
2.cos(0) = 1

Result: 1.0000000000

Frequently Asked Questions

Cosine is the ratio of adjacent side to hypotenuse in a right triangle.

cos(θ) ranges from -1 to 1 for real angles.

cos(0°) = 1.

cos(90°) = 0.

Choose the unit that matches your angle.

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CalculateMe Team

Last updated: 2026-07-14

Cosine Calculator

Formula

How It Works

Examples

cos(60°)

cos(0 rad)

Frequently Asked Questions

What is cosine?

Range of cosine?

Cosine of 0°?

Cosine of 90°?

Degrees vs radians?

Related Calculators

Cosine Calculator

Formula

How It Works

Examples

cos(60°)

cos(0 rad)

Frequently Asked Questions

What is cosine?

Range of cosine?

Cosine of 0°?

Cosine of 90°?

Degrees vs radians?

Related Calculators