AnkhKit

Trigonometric Functions Calculator (sin, cos, tan)

Runs 100% in your browser — your files never leave your device.

Sine, cosine, tangent — and arcsine, arccosine, arctangent — without digging through scientific-calculator menus. Pick the function, choose degrees or radians, type the angle (or the ratio, for the inverse functions) and read the result. Inputs outside a function's domain explain the problem instead of showing NaN.

How it works

  1. 1

    Pick the function

    sin, cos, tan — or asin, acos, atan to go from a ratio back to an angle.

  2. 2

    Choose the angle unit

    Degrees or radians, for both input and output of the inverse functions.

  3. 3

    Type the value

    The result appears live; out-of-range inputs explain themselves.

Related tools

Area Calculator Online — Circle, Rectangle, Triangle Calculate the area of a circle, square, rectangle, triangle, or trapezoid from its dimensions — the result updates as you type. Free, in-browser. Radians to Degrees Converter Online Convert between radians and degrees live as you type — either direction, with full-precision results. Free, in your browser, nothing uploaded. Rule of Three Calculator (Direct Proportion) Solve direct-proportion problems — if 3 items cost $6, what do 5 cost? Enter the three values you know and get the fourth. Free, instant, in-browser. Inverse Rule of Three Calculator Solve inverse-proportion problems — if 3 workers take 4 days, how long do 6 take? Enter the three known values and get the fourth. Free, in-browser.

More calculators & math

Percentage Calculator Online Three percentage calculations in one place: X% of Y, X is what % of Y, and percent change — live results as you type. Free and in-browser. Calculator Online (Arithmetic with Exponents) A clean online calculator for arithmetic with powers, modulo, and parentheses — the result updates as you type. Free, no sign-up, in your browser. Date and Time Difference Calculator Online Calculate the exact time between two dates — days, hours, minutes, and seconds — with live results. Free, in your browser, no sign-up.