# Thread: [SOLVED] Avoiding elliptic sine/cosine/etc

1. ## [SOLVED] Avoiding elliptic sine/cosine/etc

Hello,

I'd like to know if there is a possibility to avoid elliptic functions. My direct and practical case involves trying to find the poles and zeroes of a Cauer (elliptic) filter with the aid of a spice simulator. There are some mathematical formulae to work with but, unfortunately, they are limited; I am talking about LTspice.
So, I was wondering if there isn't a possibility to use something like Taylor series that would permit me to use some spice directives with more "gentle" formulae and calculate the poles and zeroes "on the spot"?