Trig Calculator: Sin, Cos, Tan, Inverse
This trig calculator gives all six trigonometry functions of any angle at once: sine, cosine, tangent, cosecant, secant and cotangent. Enter the angle in degrees or radians and it also shows the exact value for special angles such as 30°, 45° and 60° (for example √3/2), the reference angle, the quadrant and the coterminal angle between 0° and 360°. Switch to inverse mode to find arcsin, arccos or arctan of a value, with the answer in both degrees and radians. It is a fast trigonometry calculator for homework, test review, construction angles and programming.
Trig Calculator
All six trigonometry functions, exact values and inverse trig in degrees or radians.
How to use the Trig Calculator
- Choose angle to functions, or inverse trig.
- Enter the angle and pick degrees or radians, or enter the ratio value.
- Read all six functions, exact forms, reference angle and quadrant.
Trig identities
tan = sin/cos, csc = 1/sin, sec = 1/cos, cot = cos/sin. Radians = degrees × ฯ/180.
Features
- All six trig functions at once
- Exact values for special angles
- Degrees or radians
- Reference angle and quadrant
- Inverse sin, cos and tan
- Values that do not exist are flagged
Frequently asked questions
How do I use a trig calculator?
Type an angle, pick degrees or radians, and read sin, cos, tan and the reciprocal functions. For inverse trig, choose the inverse mode and enter a ratio.
What is sin 30 degrees?
sin 30° = 1/2 = 0.5. Also cos 60° = 1/2 and tan 45° = 1.
How do I convert degrees to radians?
Multiply degrees by ฯ/180. So 90° is ฯ/2 ≈ 1.5708 radians.
Why does tan 90° have no value?
tan = sin ÷ cos, and cos 90° = 0, so the division has no value.
What range does arcsin return?
arcsin and arctan return angles from -90° to 90°; arccos returns 0° to 180°.