Trigonometry

Octave provides the following trigonometric functions. Angles are specified in radians. To convert from degrees to radians multipy by pi/180 (e.g. sin (30 * pi/180) returns the sine of 30 degrees).

sin (x)

Mapping Function

Compute the sine of each element of x.

cos (x)

Mapping Function

Compute the cosine of each element of x.

tan (z)

Mapping Function

Compute tangent of each element of x.

sec (x)

Mapping Function

Compute the secant of each element of x.

csc (x)

Mapping Function

Compute the cosecant of each element of x.

cot (x)

Mapping Function

Compute the cotangent of each element of x.

asin (x)

Mapping Function

Compute the inverse sine of each element of x.

acos (x)

Mapping Function

Compute the inverse cosine of each element of x.

atan (x)

Mapping Function

Compute the inverse tangent of each element of x.

asec (x)

Mapping Function

Compute the inverse secant of each element of x.

acsc (x)

Mapping Function

Compute the inverse cosecant of each element of x.

acot (x)

Mapping Function

Compute the inverse cotangent of each element of x.

sinh (x)

Mapping Function

Compute the inverse hyperbolic sine of each element of x.

cosh (x)

Mapping Function

Compute the hyperbolic cosine of each element of x.

tanh (x)

Mapping Function

Compute hyperbolic tangent of each element of x.

sech (x)

Mapping Function

Compute the hyperbolic secant of each element of x.

csch (x)

Mapping Function

Compute the hyperbolic cosecant of each element of x.

coth (x)

Mapping Function

Compute the hyperbolic cotangent of each element of x.

asinh (x)

Mapping Function

Compute the inverse hyperbolic sine of each element of x.

acosh (x)

Mapping Function

Compute the inverse hyperbolic cosine of each element of x.

atanh (x)

Mapping Function

Compute the inverse hyperbolic tangent of each element of x.

asech (x)

Mapping Function

Compute the inverse hyperbolic secant of each element of x.

acsch (x)

Mapping Function

Compute the inverse hyperbolic cosecant of each element of x.

acoth (x)

Mapping Function

Compute the inverse hyperbolic cotangent of each element of x.

Each of these functions expect a single argument. For matrix arguments they work on an element by element basis. For example

     sin ([1 2; 3, 4])
          =>  0.84147   0.90930
              0.14112  -0.75680
     

atan2 (y x)

Mapping Function

Compute atan (y / x) for corresponding elements of y and x. The result is in range -pi to pi.