Hi all,
I have an expression like:
e = a + b + c*sin(x) + d*cos(x+y) + e*sin(z)**2*cos(2*z)
and I want to produce a list where just the calls to sin and cos are
collected:
desired_result = [sin(x), cos(x+y), sin(z), cos(2*z)]
Alternatively, the arguments would be sufficient:
desired_result2 = [x, x+y, z, 2*z]
I tried it with pattern matching but without success.
I think there is an elegant and short way to do it but I do not see it
right now...
Thanks.
Bastian
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