Trigonometry Calculator

Calculate sine, cosine, tangent, and their reciprocals for any angle.

Trigonometry Calculator

Quick Examples

sin(30°) = 0.5
Enter 30, select degrees
cos(60°) = 0.5
Enter 60, select degrees
tan(45°) = 1
Enter 45, select degrees

About Trigonometry

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

Basic Trigonometric Functions

Sine (sin)

Ratio of opposite side to hypotenuse in a right triangle

Cosine (cos)

Ratio of adjacent side to hypotenuse in a right triangle

Tangent (tan)

Ratio of opposite side to adjacent side in a right triangle

Reciprocal Functions

csc = 1/sin, sec = 1/cos, cot = 1/tan

Common Values

  • • sin(0°) = 0, cos(0°) = 1, tan(0°) = 0
  • • sin(30°) = 0.5, cos(30°) = √3/2, tan(30°) = 1/√3
  • • sin(45°) = 1/√2, cos(45°) = 1/√2, tan(45°) = 1
  • • sin(60°) = √3/2, cos(60°) = 0.5, tan(60°) = √3
  • • sin(90°) = 1, cos(90°) = 0, tan(90°) = undefined