Use this calculator to find the tangent (tan) of any angle in degrees.
The Tangent Calculator from Easy Converters helps you find the tangent (tan) of any angle with ease and precision. Whether you are a student, engineer, mathematician, or anyone working with trigonometric functions, this tool allows you to calculate tan(θ) in degrees or radians within seconds. Just enter the angle and get the result instantly—no manual math needed.
In trigonometry, the tangent of an angle is the ratio of the length of the opposite side to the adjacent side in a right-angled triangle. It’s one of the three fundamental trigonometric functions, alongside sine (sin) and cosine (cos).
Formula: tan(θ) = opposite / adjacent
Alternatively, in terms of sine and cosine:
tan(θ) = sin(θ) / cos(θ)
The tangent function is periodic and has asymptotes (vertical lines where the function goes to infinity) at odd multiples of 90° (or π/2 radians). It repeats every 180° (π radians).
The graph of tan(θ) shows steep curves approaching infinity at points like 90°, 270°, etc. In between, it passes through the origin (0,0), and has a steep slope increasing continuously.
| Angle (Degrees) | Angle (Radians) | tan(θ) |
|---|---|---|
| 0° | 0 | 0 |
| 30° | π/6 | ~0.577 |
| 45° | π/4 | 1 |
| 60° | π/3 | ~1.732 |
| 90° | π/2 | Undefined |
Q: Can I input angles in decimal radians?
A: Yes, the calculator accepts decimals and common radian forms like π/2.
Q: What happens at 90° or π/2?
A: Tangent is undefined at those points as cosine becomes zero and division by zero is not allowed.
Q: Is the result in degrees or radians?
A: The input defines the unit. The result is a pure number (unitless) representing the tangent ratio.
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Use the Tangent Calculator to instantly calculate tan(θ) for any angle in degrees or radians. Fast, accurate, and easy to use online tool.
The Tangent Calculator makes trigonometry easier and faster. Whether you're solving math homework, calculating slopes in engineering, or exploring angular motion in physics, this tool gives you reliable tangent values at the click of a button. Try it now and streamline your angle-based calculations.
One of the most common uses of tangent is to solve right triangle problems. When you know the length of one side and the angle, you can use the tangent function to calculate the missing side:
Example: If θ = 30° and the adjacent side = 5 cm, then:
tan(30°) = opposite / 5
tan(30°) ≈ 0.577, so:
0.577 = opposite / 5 → opposite ≈ 2.885 cm
This calculator is often used along with the inverse tangent (also known as arctangent or tan⁻¹), which is used to find the angle when the ratio is known.
Formula: θ = arctan(opposite / adjacent)
Example: If opposite = 4 and adjacent = 3, then θ = arctan(4/3) ≈ 53.13°
Because tan(θ) = sin(θ)/cos(θ), wherever cos(θ) = 0, the tangent is undefined. This occurs at angles like 90°, 270°, etc., or π/2, 3π/2 in radians. The calculator will alert users when an undefined value is encountered, ensuring accuracy and avoiding misinterpretations.
Since the tangent function repeats every 180°, it's important to understand its cyclical behavior. Some values for a full cycle are:
Tangent is a key player in various branches of science:
In calculus, tangent plays an essential role, especially in derivatives and integrals involving trigonometric functions. For example:
This calculator can be used as a support tool when solving calculus problems that involve the tangent function.
Sometimes users need to convert between units before using the calculator. Here's how you do it:
Example: 60° = 60 × π/180 = π/3 radians
Teachers can pair this calculator with an interactive graphing tool to demonstrate the behavior of the tangent function in real time. Observing how tan(θ) changes as the angle increases helps students develop a better intuition about the function’s growth and asymptotes.
The Tangent Calculator is optimized for all devices—whether you are on a desktop, tablet, or mobile phone. It is also built with accessibility in mind, supporting screen readers and high-contrast mode for users with visual impairments.
Here are a few practical examples where tangent is applied daily:
With its precision and speed, the Tangent Calculator is the perfect assistant for anyone dealing with angles and trigonometry. Beyond just numbers, it empowers deeper understanding, faster problem-solving, and improved accuracy in academic, technical, and real-life scenarios. Try it today to explore the full potential of the tangent function—one of the cornerstones of mathematics and science.