Creators
Rojony Khatun Author
Rojony Khatun
CalculatorToolsProjectExpert
Reviewers
Małgorzata Koperska, MD Steven Wooding
Last updated: November 18, 2025

Trigonometric Functions | Sin, Cos, Tan Calculator & Guide

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Trigonometric Functions

Trigonometric Functions

Explore all trigonometric functions, including sine, cosine, tangent, secant, cosecant, and cotangent. Calculate values instantly with degrees or radians.

trigonometric functions calculator

The trigonometric functions are functions that characterize the relationships between angles and triangle sides ratios. The six primary functions are sin, cos, tan, csc, sec, and cot, which are used to compute the angles, distances, and waveforms in mathematics, physics, and engineering.

radian degree trig calculator

The trigonometric functions characterize the correlation between angles and sides of a triangle. The most used ones are sine (sin), the cos (cos), and tangent (tan), as well as the reciprocals of these functions: cosecant (csc), secant (sec), and cotangent (cot). These applications are in geometry, algebra, physics, engineering, and navigation.

It is simple to compute values of any angle using a trigonometric function calculator, be it in degrees or radians. The calculator is able to compute sin, cos, tan, and their inverse functions (arcsin, arccos, and arctan) immediately. It also has identities of trigonometry, unit circle identities, and identities of angles. This renders it ideal among students, teachers, and professionals who require proficient and rapid trigonometric results of equations, graphs, hs real-life applications.

Work / Installation / Input / Output

Work

  • Computes sin, cos, tan, csc, sec, and cot values.
  • Supports degrees and radians.
  • Includes inverse functions and identities.
  • Generates step-by-step results.

InstallationNo installation needed—runs in any browser.

Input

  • Angle (degree/radian)
  • Function selection (sin, cos, tan, etc.)

Output

  • Trig function value
  • Optional inverse or identity result
  • Unit circle relation

Testing & Final Adjustments

Check the calculator with the usual angles, such as 0, 30, 45, 60, and 90, to be sure that the calculator is correct. Make sure that the tool can be changed to and from degrees to radians. Reciprocal functions that are not defined where division by zero is taken.n Check reciprocal functions (csc, sec, cot) are functions that cannot be directly divided by zero. Inverse functions are given the correct principal angles. Test integer and decimal input, negative angles. Ensure that there are error messages as required. Code is optimized to run quickly, and rounding is added to make the code understandable. Make sure it is ismobile-friendlyy and up to date.

Frequently Asked Questions - Trigonometric Functions:

What are trigonometric functions?

They are functions that relate angles to ratios of triangle sides.

Which functions are included?

Sin, cos, tan, sec, csc, and cot, plus inverse functions.

How do I calculate trig values?

Enter an angle in degrees or radians and select the function.

What is sine?

Opposite side divided by hypotenuse.

What is cosine?

Adjacent side divided by hypotenuse.

What is tangent?

Opposite side divided by adjacent side.

Do you support radians?

Yes, both degrees and radians are supported.

Can it calculate inverse trig?

Yes, arcsin, arccos, and arctan are included.

Is this tool free?

Yes, it is 100% free to use.

Who uses trig functions?

Students, engineers, architects, and scientists.

Rojony Khatun

Rojony Khatun

Calculator Tools Project

Rojony Khatun is the creator of a free online tools website designed to simplify everyday and engineering-related calculations for students, professionals, and hobbyists. The platform offers a wide variety of basic and advanced calculators across key categories, including Electrical Calculators, Electronic Calculators, and Time & Date Calculators, helping users solve problems quickly and accurately.