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Trigonometry Calculator

Calculate sin, cos, tan and inverse trig functions

Trigonometry Calculator

Primary Functions

Inverse Functions

Related Tools

About This Calculator

This trigonometry calculator computes the values of all six trigonometric functions for any angle you enter: sine (sin), cosine (cos), tangent (tan), cosecant (csc), secant (sec), and cotangent (cot). It also computes inverse trigonometric functions (arcsin, arccos, arctan) to find angles from known ratios. You can input angles in either degrees or radians, and the tool handles the conversion between the two. The six trig functions relate the angles and sides of a right triangle: sin(theta) = opposite/hypotenuse, cos(theta) = adjacent/hypotenuse, and tan(theta) = opposite/adjacent. This tool is helpful for students working through trigonometry homework, engineers and scientists who need quick trig values, and anyone converting between degrees and radians. Enter an angle to see all six function values at once.

How to Use

  1. 1
    Select a function
    Choose the trigonometric function you need such as sin, cos, or tan.
  2. 2
    Enter the value
    Input the angle in degrees or radians, or a ratio for inverse functions.
  3. 3
    View the result
    See the computed value along with a unit circle visualization.

Frequently Asked Questions

Q. What are the basic trigonometric ratios?
The three primary ratios for a right triangle are: sine = opposite/hypotenuse, cosine = adjacent/hypotenuse, and tangent = opposite/adjacent. The mnemonic SOH-CAH-TOA helps remember them. Their reciprocals are cosecant (1/sin), secant (1/cos), and cotangent (1/tan).
Q. How do I convert degrees to radians?
Multiply degrees by pi/180. So 90 degrees = pi/2 radians, 180 degrees = pi radians, and 360 degrees = 2pi radians. To convert radians to degrees, multiply by 180/pi. This calculator handles the conversion for you automatically.
Q. What are inverse trig functions?
Inverse trig functions (arcsin, arccos, arctan) do the opposite of regular trig functions — they take a ratio and return the angle. For example, arcsin(0.5) = 30 degrees because sin(30 degrees) = 0.5. This tool computes inverse functions so you can find angles from known side ratios.
Q. Does this calculator support both degrees and radians?
Yes. You can enter your angle in either degrees or radians and the calculator will compute all six trig function values. It is useful for checking homework or verifying calculations in either unit system.

Disclaimer: Results are for informational purposes only and do not constitute professional advice. Always consult qualified professionals for important decisions.

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