Does this use degrees or radians?

You enter the angle in degrees; the calculator converts internally to radians since that's what the underlying trigonometric functions require.

Trigonometry Calculator

Sine, cosine, tangent, and more

Angle (degrees)

sin, cos, tan, and cot of an angle, computed in degrees and converted to radians internally.

Example 1

Angle=45°

sin=0.7071, cos=0.7071, tan=1.0

Calculate percentages, percentage increase, and percentage difference

Add, subtract, multiply, and divide fractions

Calculate powers and exponents

Find the square root of any number