A simple RPN calculator (V0.3). Supports pi, e, rnd, !, *, +, -, /, acos, asin, atan, cos, deg, log, log10, pow, rad, recip, sin, sqr, sqrt and tan. Type ? for a list of operators, clr to clear the stack, swap to swap the two most recent stack items, roll to roll the stack, drop to drop the last stack item, and q to quit.
Example:
> 3 sqr 4 sqr + 5 sqr - 2 3 * 4 * / acos deg
[90.0]
> 4 sqr 5 sqr + 3 sqr - 2 4 * 5 * / acos deg
[90.0, 36.86989764584401]
> 5 sqr 3 sqr + 4 sqr - 2 5 * 3 * / acos deg
[90.0, 36.86989764584401, 53.13010235415599]
> +
[90.0, 90.0]
> +
[180.0]