Trigonometric and Related Functions

sin theta [function]

theta is a float representing angle by radian. returns $sin(theta)$.

cos theta [function]

theta is a float representing angle by radian. returns $cos(theta)$.

tan theta [function]

theta is a float representing angle by radian. returns $tan(theta)$.

sinh x [function]

hyperbolic sine, that is, $\frac{e^{x}-e^{-x}}{2}$.

cosh x [function]

hyperbolic cosine, that is, $\frac{e^{x}+e^{-x}}{2}$.

tanh x [function]

hyperbolic tangent, that is, $\frac{e^{x}+e^{-x}}{e^{x}-e^{-x}}$.

asin number [function]

arc sine of number.

acos number [function]

arc cosine of number.

atan y &optional x [function]

When atan is called with one argument, its arctangent is calculated. When called with two arguments, $atan(y/x)$ is returned.

asinh x [function]

hyperbolic arc sine.

acosh x [function]

hyperbolic arc cosine.

atanh x [function]

hyperbolic arc tangent.

sqrt number [function]

returns square root of number.

log number [function]

returns natural logarithm of number.

exp x [function]

returns exponential, $e^{x}$.

expt a x [function]

returns xth power to a.