Trigonometry Calculator
sin, cos, tan & more — instantly
Calculate sine, cosine, tangent and their reciprocals for any angle, in degrees or radians. Built for TN Board, CBSE, JEE and NEET students — free, unlimited, no sign-up needed.
Enter an angle to calculate
Common Angle Values (Reference Table)
Free Online Trigonometry Calculator for Indian Students
This free trigonometry calculator instantly gives you sin, cos, tan, cosec, sec and cot for any angle — in degrees or radians — with no sign-up and no daily limit. It's built for TN Board, CBSE, JEE and NEET students who need a fast, reliable way to check trigonometric values while solving homework or practicing for exams.
Unlike a plain scientific calculator, this tool shows you all six trigonometric ratios at once, so you can quickly compare sin θ against cos θ or spot a reciprocal relationship without switching modes. For standard angles like 0°, 30°, 45°, 60° and 90°, exact values are shown in the reference table above — exactly the form your board exam expects, since calculators aren't permitted in the exam hall.
If you're stuck on why a formula or identity works — not just what the number is — StudyHelpAI's free AI Maths tutor explains trigonometric concepts, identities and derivations step by step in English or Tamil.
← Back to Maths Homework HelpTrigonometry Calculator — Questions Answered
Yes — it's completely free with no sign-up, no daily limit, and no ads. It runs entirely in your browser, so results are instant.
Yes. Use the Degrees/Radians toggle above the angle field to switch before calculating — useful for JEE and higher-level problems that use radian measure.
Because tan θ = sin θ / cos θ, and cos 90° = 0. Dividing by zero is undefined, which is why tan (and sec) are undefined at 90°, 270°, and other odd multiples of 90°.
Yes — enter a negative number and it will calculate the correct signed values based on which quadrant the angle falls into.
No — most board and entrance exams don't allow calculators or phones. Use this tool for practice and homework, but memorise the standard angle values (0°, 30°, 45°, 60°, 90°) from the reference table for exam day.