Tangent Calculator

The tangent of an angle in a right triangle is the ratio of the length of the opposite side to the adjacent side. In mathematical terms, tan(θ) = sin(θ)/cos(θ). This Tangent Calculator provides fast and precise results for both degrees and radians. Whether you're a student tackling trigonometry homework, a teacher preparing examples, or a professional needing quick angle analysis, this tool delivers.

Our calculator uses high‑precision JavaScript math routines, ensuring accurate results even for unusual angles (like 90°, 180° etc.) where tangent may be undefined or infinite — we handle edge cases and display “undefined / infinite” accordingly. The interface is clean and mobile‑friendly: simply enter your angle, choose the unit, and click calculate. The result is shown immediately with up to 12 decimal places.

Tangent functions appear everywhere: in physics (wave motion, optics), engineering (slopes, forces), and even in computer graphics. This tool is part of the MultiCalculators family, designed to be accessible and reliable. The page is fully indexed for search engines, with carefully selected meta information to help students and professionals find exactly what they need. Use it for free, as many times as you like. For questions or feedback, visit our Contact Us page. Keep calculating!

Note: For angles where cos(θ)=0 (e.g., 90°, 270° in degrees, π/2 in radians), the tangent is undefined (approaches ±∞). The calculator will show "∞ (undefined)" in such cases.