Math

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Sine, Cosine and Tangent Calculator.

Calculate the three basic trigonometric ratios for an angle in degrees.

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Set your values

Results update as you type.

Angle (radians): 0.523599

Angle (radians)

0.000000
Sine: 0.5

Sine

0.000000
Cosine: 0.866025

Cosine

0.000000
Tangent: 0.57735

Tangent

0.000000

Results update automatically as you type.

Use Cases

Solve trigonometry homework problems

Quickly find sine, cosine, and tangent values for angles in degrees, helping you verify answers or understand trigonometric functions.

Example: Find sin(30°), cos(30°), and tan(30°) for a math assignment.

Engineering and physics calculations

Use the trigonometric values for angles in degrees to analyze forces, vectors, or waveforms in technical projects.

Example: Calculate the horizontal and vertical components of a force at 45°.

Frequently Asked Questions

What does this calculator do?
This calculator computes the sine, cosine, and tangent of an angle you enter in degrees. Simply input the angle in degrees, and it returns the three primary trigonometric ratios.
Can I use this calculator for angles in radians?
No, this calculator only accepts angles in degrees. If you have an angle in radians, convert it to degrees first (multiply by 180/π) before using this tool.
What is the range of angles I can enter?
You can enter any real number for the angle in degrees, including negative angles and angles greater than 360°. The calculator will compute the trigonometric values for that angle.

Tips & Common Mistakes

Tips

  • Remember that tangent is undefined for angles where cosine is zero, such as 90° and 270°. The calculator may show an error or 'undefined' for those.
  • For angles outside 0° to 360°, the trigonometric values repeat every 360°. You can reduce the angle by adding or subtracting multiples of 360° to find an equivalent angle.
  • Double-check that your angle is in degrees, not radians. If you're using a formula that expects radians, convert first.
  • Use the calculator to explore how sine and cosine values change as the angle increases from 0° to 90°, and how tangent grows rapidly near 90°.

Common Mistakes to Avoid

  • Entering the angle in radians instead of degrees, which leads to incorrect results.
  • Assuming tangent is always defined; it is undefined at 90° and 270° (and their multiples).
  • Forgetting that trigonometric functions are periodic, so angles like 30° and 390° have the same sine, cosine, and tangent values.

Last updated: August 13, 2026