Trigonometry

acos (x)

Aliases: arccos

The arccos (inverse cos) function.

acosh (x)

Aliases: arccosh

The arccosh (inverse cosh) function.

acot (x)

Aliases: arccot

The arccot (inverse cot) function.

acoth (x)

Aliases: arccoth

The arccoth (inverse coth) function.

acsc (x)

Aliases: arccsc

The inverse cosecant function.

acsch (x)

Aliases: arccsch

The inverse hyperbolic cosecant function.

asec (x)

Aliases: arcsec

The inverse secant function.

asech (x)

Aliases: arcsech

The inverse hyperbolic secant function.

asin (x)

Aliases: arcsin

The arcsin (inverse sin) function.

asinh (x)

Aliases: arcsinh

The arcsinh (inverse sinh) function.

atan (x)

Aliases: arctan

Calculates the arctan (inverse tan) function.

See Wikipedia or Mathworld for more information.

atanh (x)

Aliases: arctanh

The arctanh (inverse tanh) function.

atan2 (y, x)

Aliases: arctan2

Calculates the arctan2 function. If x>0 then it returns atan(y/x). If x<0 then it returns sign(y) * (pi - atan(|y/x|). When x=0 it returns sign(y) * pi/2. atan2(0,0) returns 0 rather then failing.

See Wikipedia or Mathworld for more information.

cos (x)

Calculates the cosine function.

See Planetmath for more information.

cosh (x)

Calculates the hyperbolic cosine function.

See Planetmath for more information.

cot (x)

The cotangent function.

See Planetmath for more information.

coth (x)

The hyperbolic cotangent function.

See Planetmath for more information.

csc (x)

The cosecant function.

See Planetmath for more information.

csch (x)

The hyperbolic cosecant function.

See Planetmath for more information.

sec (x)

The secant function.

See Planetmath for more information.

sech (x)

The hyperbolic secant function.

See Planetmath for more information.

sin (x)

Calculates the sine function.

See Planetmath for more information.

sinh (x)

Calculates the hyperbolic sine function.

See Planetmath for more information.

tan (x)

Calculates the tan function.

See Planetmath for more information.

tanh (x)

The hyperbolic tangent function.

See Planetmath for more information.