| Issue 1590: | Reduce powers of sin's and cos's to multi-argument functions | |
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I don't know what the name of such a function would be, but we need a way to apply the identities: sin(x)**2 => 1/2 - cos(2*x)/2 cos(x)**2 => 1/2 + cos(2*x)/2 There are also rules for combination of sins and cos, and higher powers. See http://en.wikipedia.org/wiki/Trig_identities#Power-reduction_formulas. Probably we should also have a way to go the other way too. |
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