Trigonometry Calculator

Calculate sine, cosine, tangent, cosecant, secant, and cotangent for an angle entered in degrees or radians.

About Trigonometry Calculator

Trigonometric functions relate an angle to ratios of the sides of a right triangle. This calculator converts degrees to radians (radians = degrees × π ÷ 180), then evaluates sin, cos, and tan, plus the reciprocals cosec = 1 ÷ sin, sec = 1 ÷ cos, and cot = 1 ÷ tan. Results are rounded to eight decimal places. Values that grow without bound, such as tan 90°, are shown as undefined.

Also known as: Trigonometric Functions.

How to use Trigonometry Calculator

Fill in "Angle" and "Unit".
The result appears below and updates as you type.
Copy the result with the copy button, or download it as a file where that is offered.

Questions about Trigonometry Calculator

How do I convert degrees to radians?

Multiply the degrees by π and divide by 180. So 30° is π ÷ 6, about 0.5236 radians, and 180° is exactly π radians. The calculator shows the angle in both units.

Runs in your browser. Page last updated November 12, 2026.

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