Frequently Asked Questions
Everything you need to know about the Sin Cos Tan Calculator.
What does this calculator compute?
All six trig functions (sin, cos, tan, csc, sec, cot) for any angle, plus their inverses.
Can I use degrees or radians?
Yes, toggle between them; results update instantly.
What is inverse mode?
Enter a ratio and get the angle back using arcsin, arccos, or arctan.
Why is my inverse input rejected?
Arcsin and arccos only accept values between -1 and 1; anything outside is flagged.
What happens at undefined points (like tan at 90°)?
It's clearly labeled undefined rather than showing an error or Infinity.
Does it show exact values?
Yes, for standard angles (multiples of 30°/45°/60°) exact fractional/surd forms are shown alongside decimals.
What's the principal value range for inverse functions?
arcsin/arctan give -90° to 90°; arccos gives 0° to 180° — the calculator follows this convention.
Can I enter angles greater than 360° or negative?
Yes, they're automatically reduced to the correct reference angle and quadrant.
Is it free?
Completely free, no sign-up or limits.
Does it work on mobile?
Yes, fully responsive.