Frequently Asked Questions
How do I convert between degrees and radians?
Multiply degrees by pi/180 to get radians, or multiply radians by 180/pi to get degrees. For example, 90 degrees = pi/2 radians.
Does the calculator support inverse trig functions?
Yes, arcsin, arccos, and arctan are fully supported. Enter a value and the calculator returns the corresponding angle in both degrees and radians.
What are the key trigonometric identities?
Fundamental identities include sin^2(x) + cos^2(x) = 1 and tan(x) = sin(x)/cos(x). The calculator also references double-angle and sum formulas.
Verified 2026 formulas