If $\sin\theta = x$, then $\theta = \sin^{-1}x$, provided $-1\leq x\leq 1$ and $-\frac{\pi}{2}\leq\theta\leq\frac{\pi}{2}$. If $\cos\theta = x$, then $\theta = \cos ...
A generalization of the circular and hyperbolic functions is proposed, based on the Tsallis statistics and on a consistent generalization of the Euler formula. Some properties of the presently ...
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