IMSL Fortran Math Special Functions Library
Chapter 2:
Trigonometric and Hyperbolic Functions
Routines
Trigonometric Functions
Evaluates tan
z
for complex
z
,
TAN
Evaluates cot
x
for real
x
,
COT
Evaluates sin
x
for
x
a real angle in degrees
,
SINDG
Evaluates cos
x
for
x
a real angle in degrees
,
COSDG
Evaluates sin
−
1
z
for complex
z
,
ASIN
Evaluates cos
−
1
z
for complex
z
,
ACOS
Evaluates tan
−
1
z
for complex
z
,
ATAN
Evaluates tan
−
1
(
x
/
y
) for
x
and
y
complex
,
ATAN2
Hyperbolic Functions
Evaluates sinh
z
for complex
z
,
SINH
Evaluates cosh
z
for complex
z
,
COSH
Evaluates tanh
z
for complex
z
,
TANH
Inverse Hyperbolic Functions
Evaluates sinh
−
1
x
for real or complex
x
,
ASINH
Evaluates cosh
−
1
x
for real or complex
x
,
ACOSH
Evaluates tanh
−
1
x
for real or complex
x
,
ATANH