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📐 Trigonometry Calculator

Calculate trigonometric functions including sin, cos, tan, arcsin, arccos, and arctan. Supports both degrees and radians.

How to Use the Trigonometry Calculator

  1. Enter a value — Type an angle (for sin/cos/tan) or a ratio (for arcsin/arccos/arctan).
  2. Select unit — Choose degrees or radians for angle-based functions.
  3. Choose function — Select from sin, cos, tan, arcsin, arccos, or arctan.
  4. Click Calculate — View the result with radians conversion and formula details.

Features

  • ✅ 6 trigonometric functions (sin, cos, tan, arcsin, arccos, arctan)
  • ✅ Supports degrees and radians
  • ✅ Shows radians conversion for reference
  • ✅ Handles edge cases (asymptotes, domain errors)
  • ✅ Completely free with no sign-up required

Tool Tags

Trigonometry Calculator Sin Cos Tan Trig Calculator Math Calculator Angle Calculator Inverse Trig

Frequently Asked Questions

What is the difference between degrees and radians?

Degrees and radians are two units for measuring angles. A full circle is 360\u00b0 or 2\u03c0 radians. To convert: radians = degrees \u00d7 \u03c0/180, degrees = radians \u00d7 180/\u03c0.

What are inverse trigonometric functions?

Inverse trig functions (arcsin, arccos, arctan) find the angle that produces a given trig ratio. For example, arcsin(0.5) = 30\u00b0 because sin(30\u00b0) = 0.5.

Why does tan(90\u00b0) show as undefined?

Tangent is undefined at 90\u00b0 (and 270\u00b0) because cos(90\u00b0) = 0, and tan = sin/cos. Division by zero is mathematically undefined, creating an asymptote.

What are the domain restrictions for inverse functions?

arcsin and arccos only accept inputs between -1 and 1. arctan accepts any real number. These restrictions exist because sine and cosine only output values in [-1, 1].

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