Trigonometry Calculator
Calculate sine, cosine, tangent of an angle. Choose degrees or radians.
How does the trigonometry calculator work?
This calculator computes the three fundamental trigonometric functions — sine (sin), cosine (cos), and tangent (tan) — for any angle you enter. Select degrees or radians, enter the angle, and click "Calculate". The tool instantly returns all three values with high precision. It's ideal for solving geometry problems, checking homework, or performing quick trigonometric calculations without a scientific calculator.
How to use the Trigonometry Calculator
Enter the angle value in the input field. Choose the unit — degrees (e.g. 45°) or radians (e.g. π/4 ≈ 0.785). Click "Calculate" to see the sine, cosine, and tangent of that angle. Switch between units at any time and recalculate as needed.
Example calculations
45° → sin = 0.7071, cos = 0.7071, tan = 1.0000. 30° → sin = 0.5000, cos = 0.8660, tan = 0.5774. π/6 rad (≈0.5236) → sin = 0.5000, cos = 0.8660, tan = 0.5774. The calculator also handles negative angles and angles greater than 360°.
Frequently Asked Questions
Why is tangent undefined for some angles?
Tan(θ) = sin(θ) / cos(θ). When cos(θ) = 0 (at 90°, 270°, etc.), division by zero occurs and tangent is undefined. The calculator shows "Undefined" for these angles.
What is the difference between degrees and radians?
Degrees divide a circle into 360 parts; radians divide it into 2π (≈6.283) parts. 180° = π rad. Radians are the standard unit in higher mathematics and physics, while degrees are more common in everyday use.