Difference between revisions of "Q-Cos"
From specialfunctionswiki
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Revision as of 23:13, 26 June 2016
The function $\mathrm{Cos}_q$ is defined by $$\mathrm{Cos}_q(z)=\dfrac{E_q(iz)+E_q(-iz)}{2},$$ where $E_q$ denotes the $q$-exponential $E$.
Properties
q-Euler formula for E sub q
q-derivative of q-Cos
