What is the Trigonometry Calculator?
Calculate sin, cos, tan, csc, sec, cot, and inverse trig functions with this free online trigonometry calculator. Switch between degrees and radians, enter angles or ratios, and get exact values for common angles like 30°, 45°, and 60° with full step-by-step work. Runs entirely in your browser with no signup.
How to use the Trigonometry Calculator
- Choose a trig function or All ratios mode.
- Select degrees or radians.
- Enter an angle (or ratio for inverse functions).
- Click Calculate.
- Copy the result or the full summary with steps.
Common use cases
- Finding sin(30°) = 1/2 for geometry homework
- Converting arctan(1) = 45° for a right-triangle problem
- Listing all six ratios at 45° in one click
Frequently asked questions
- What trig functions are supported?
- sin, cos, tan, csc, sec, cot, arcsin, arccos, arctan, plus an All ratios mode that shows all six ratios for a given angle.
- Can I use pi in radian mode?
- Yes. Enter expressions like pi, pi/4, pi/2, or 2*pi for radian angles.
- What are the exact values shown?
- Common angles such as 30°, 45°, 60°, and 90° display exact forms like 1/2, √2/2, and √3/2 alongside decimal results.
- What domain restrictions apply?
- arcsin and arccos require inputs between −1 and 1. csc, sec, and cot are undefined when sin, cos, or tan equal zero.
