Hello, I'm trying to define inverse csc, sec, and cot and their hyperbolic versions. I dug through $SAGE_ROOT/devel/sage-main/build/sage/calculus/calculus.py and thought I could just use some identities and copy similar definitions for the other inverse trig functions. I tried this:
class Function_acot(PrimitiveFunction):
"""
The arccotangent function.
"""
def _repr_(self, simplify=True):
return "acot"
def _latex_(self):
return "\\cot^{-1}"
def _approx_(self, x):
return pi/2 - math.atan(x)
acot = Function_acot()
_syms['acot'] = acot
...but when I started Sage back up, it didn't know what "acot" was:
sage: acot(2)
---------------------------------------------------------------------------
<type 'exceptions.NameError'> Traceback (most recent call last)
/tmp/<ipython console> in <module>()
<type 'exceptions.NameError'>: name 'acot' is not defined
How do I get Sage to figure out what acot is? And should I use "pi/2"
above, or do I need to use math.pi()/2 or whatever?
And having done that, how do I tell Sage how to do calculus with those
functions?
Thanks,
Dan
--
--- Dan Drake <[EMAIL PROTECTED]>
----- KAIST Department of Mathematical Sciences
------- http://math.kaist.ac.kr/~drake
signature.asc
Description: Digital signature
