Instantly calculate sine, cosine and tangent for any angle, in degrees or radians.
Enter the angle
Enter the angle and choose degrees or radians. Sine, cosine and tangent are computed.
Standard mathematical formulas. Instant in-browser calculation, no account. Exact results for the values you enter.
Trigonometric functions link an angle to the side ratios of a right triangle. The angle can be given in degrees or radians (180° = π radians):
sin 30° = 0.5, cos 60° = 0.5, tan 45° = 1. At 90°, the tangent is undefined (cos 90° = 0).
Trigonometric functions linking angles to the side ratios of a right triangle: sine = opposite ÷ hypotenuse, cosine = adjacent ÷ hypotenuse, tangent = sine ÷ cosine.
Enter the angle and choose degrees or radians; the sine appears instantly. For example, sin 30° = 0.5.
A full circle is 360 degrees or 2π radians. The radian is the “natural” unit, used in advanced mathematics.
Multiply degrees by π ÷ 180. For example, 180° = π radians ≈ 3.1416; 90° = π/2 ≈ 1.5708.
sin 30° = 0.5, cos 60° = 0.5, and tan 45° = 1. These are common, easy-to-remember values.
Because tan = sin ÷ cos, and cos 90° = 0. Division by zero is undefined, so the tangent tends to infinity.
Construction, navigation, physics, engineering, computer graphics and computing inaccessible distances and heights.
A circle of radius 1 where the coordinates of a point at a given angle are (cos, sin). It helps understand function values for any angle.