Trigonometric Ratio Calculator — How It Works

Sine, cosine, and tangent describe the ratios of sides in a right triangle relative to an angle — and extend to any angle via the unit circle.

How it works

Enter an angle in degrees and choose sin, cos, or tan. The angle is converted to radians (radians = degrees × π / 180) before the trig function is applied.

Example

sin(30°) = 0.5
cos(60°) = 0.5
tan(45°) = 1

Common angles

Angle	sin	cos	tan
0°	0	1	0
30°	1/2	√3/2	√3/3
45°	√2/2	√2/2	1
60°	√3/2	1/2	√3
90°	1	0	undefined

Try the Trigonometric Ratio Calculator — instant results, no sign-up.

FAQ

Is this free?

Yes — the Trigonometric Ratio Calculator runs entirely in your browser, no sign-up required.

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