Difference between revisions of "Delta cosine"
From timescalewiki
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Let $\mathbb{T}$ be a [[time_scale | time scale]] and let $t_0 \in \mathbb{T}$ and let $\mu p^2 \colon \mathbb{T} \rightarrow \mathbb{R}$ be a [[regressive_function | regressive function]]. We define the trigonometric functions $\cos_p \colon \mathbb{T} \rightarrow \mathbb{R}$ | Let $\mathbb{T}$ be a [[time_scale | time scale]] and let $t_0 \in \mathbb{T}$ and let $\mu p^2 \colon \mathbb{T} \rightarrow \mathbb{R}$ be a [[regressive_function | regressive function]]. We define the trigonometric functions $\cos_p \colon \mathbb{T} \rightarrow \mathbb{R}$ | ||
$$\cos_p(t,t_0)=\dfrac{e_{ip}(t,t_0)+e_{-ip}(t,t_0)}{2},$$ | $$\cos_p(t,t_0)=\dfrac{e_{ip}(t,t_0)+e_{-ip}(t,t_0)}{2},$$ | ||
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=Properties= | =Properties= | ||
| − | + | [[Derivative of delta cosine]]<br /> | |
| − | + | [[Sum of squares of delta cosine and delta sine]]<br /> | |
| − | + | [[Derivative of Delta sine]]<br /> | |
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=Examples= | =Examples= | ||
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<center>{{:Delta special functions footer}}</center> | <center>{{:Delta special functions footer}}</center> | ||
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| + | [[Category:specialfunction]] | ||
Revision as of 21:21, 9 June 2016
Let $\mathbb{T}$ be a time scale and let $t_0 \in \mathbb{T}$ and let $\mu p^2 \colon \mathbb{T} \rightarrow \mathbb{R}$ be a regressive function. We define the trigonometric functions $\cos_p \colon \mathbb{T} \rightarrow \mathbb{R}$ $$\cos_p(t,t_0)=\dfrac{e_{ip}(t,t_0)+e_{-ip}(t,t_0)}{2},$$ where $i=\sqrt{-1}$.
Plot of $\cos_{0.6}(t,0;\mathbb{Z})$.
Properties
Derivative of delta cosine
Sum of squares of delta cosine and delta sine
Derivative of Delta sine
Examples
| $\mathbb{T}$ | $\cos_p(t,s)= $ |
| $\mathbb{R}$ | |
| $\mathbb{Z}$ | |
| $h\mathbb{Z}$ | |
| $\mathbb{Z}^2$ | |
| $\overline{q^{\mathbb{Z}}}, q > 1$ | |
| $\overline{q^{\mathbb{Z}}}, q < 1$ | |
| $\mathbb{H}$ |
See Also
$\Delta$-special functions on time scales | ||||||
 $\cos_p$ |
 $\cosh_p$ |
 $e_p$ |
 $g_k$ |
 $h_k$ |
 $\sin_p$ |
 $\sinh_p$ |
