All,
I'd like SymPy to simplify some trig expressions (see below), but I'm
stumped. What's the appropriate call (I assume to one of the functions
in http://docs.sympy.org/0.7.2/modules/simplify/simplify.html)? I've tried
several and can't seem to figure out the right approach.
from sympy import symbols, sin, cos
from sympy.simplify import *
s = symbols('s')
expr = sin(s)**2 + cos(s)**2
print('Original expression: %s' % expr)
print('Simplifies to: %s' % simplify(expr))
expr2 = (expr**2).expand()
print('Original squared: %s' % expr2)
print('Simplifies to: %s' % trigsimp(expr2))
The output:
Original expression: sin(s)**2 + cos(s)**2
Simplifies to: 1
Original squared: sin(s)**4 + 2*sin(s)**2*cos(s)**2 + cos(s)**4
Simplifies to: sin(s)**4 - cos(s)**4 + 2*cos(s)**2
I'd like the last line to read: "Simplifies to: 1"
Any ideas?
Thanks!
Bryan
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