Graphing Calculator

Drag to pan, scroll to zoom, hover to trace. The derivative is worked out symbolically from the parse tree, not estimated, so it comes back as an expression you can read.

+ − * / ^, parentheses, and sin cos tan asin acos atan sqrt abs ln log exp floor ceil sign, with the constants pi and e. Juxtaposition multiplies, so 2x and 3sin(x) both work.

Exact results

Function

Exact algebra comes from nerdamer (MIT), which is the one piece of this site I did not write. It is 426 kB, so it is fetched when you press the button and not before.

Area under a curve

Function

From x

To x

Integral

Adaptive Simpson, refined until the estimate stops moving. Signed, so area below the axis counts as negative.