vault backup: 2023-02-16 11:41:39

This commit is contained in:
Daniel Bulant 2023-02-16 11:41:39 +01:00
parent 97bdb7eaca
commit d5d5a43b41
13 changed files with 83 additions and 10 deletions

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"mat/Funkce/Cosinus.md",
"mat/Funkce/Cotangens.md",
"mat/Funkce/Sinus.md",
"mat/Funkce/Goniometrické funkce.md",
"mat/Funkce/Tangens.md",
"mat/Funkce/Příklady.md",
"mat/Funkce/Sinus.md",
"mat/Funkce/Cotangens.md",
"mat/Funkce/Cosinus.md",
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@ -5,4 +5,20 @@ tags:
---
# Cosinus
$\cos \alpha$
Přilehlá strana ku přeponě v pravoúhlém trojúhelníku.
Přilehlá strana ku přeponě v pravoúhlém trojúhelníku.
![](Pasted%20image%2020230216111614.png)
perioda $2\pi$
$\cos x=\sin(x+\frac\pi2),\forall x \in\mathbb{R}$
$y=A\sin(Bx+C)+D; A,B,C,D\in\mathbb{R}$
$A>0\updownarrow$ $B>1\leftrightarrow$ (obracene)
$A<0\updownarrow$ $0<B<1 \leftrightarrow$
$D>0 \uparrow$
$D<0\downarrow$
$C>0\leftarrow$
$C<0\rightarrow$

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@ -10,6 +10,8 @@ $\cotg\alpha=\frac{b}a$
![](Pasted%20image%2020230215114031.png)
![](Pasted%20image%2020230216110440.png)
---
V pravoúhlem $\triangle ABC$ ($C$): $\beta=38\degree$; $a=7cm$, ostatní úhly a strany?
@ -66,3 +68,38 @@ d)
$\cos(-180\degree)=1$
$\cos120\degree=\sin60\degree=\frac{\sqrt3}2$
$\cos240\degree=-\sin30\degree=-\frac12$
---
$f_1: y=\sin x$
$f_1(0)=0$
$f_1(\frac\pi2)=1$
$f_1(\frac\pi3)=0.5$
![](Pasted%20image%2020230216113442.png)
---
$f_2:u=\sin x+2$
$f_1(0)=2$
$f_1(\frac\pi2)=3$
$f_1(\frac\pi3)=2.5$
![](Pasted%20image%2020230216113554.png)
---
$f_3: y=\sin(x+2)$
![](Pasted%20image%2020230216113714.png)
---
$f_4: y=2\sin x$
$f_4(0)=0$
$f_4(\frac\pi2)=2$
$f_4(\frac\pi3)=1$
![](Pasted%20image%2020230216114136.png)

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@ -5,4 +5,12 @@ tags:
---
# Sinus
$\sin \alpha$
Protilehlá strana ku přeponě v pravoúhlém trojúhelníku.
Protilehlá strana ku přeponě v pravoúhlém trojúhelníku.
![](Pasted%20image%2020230216111329.png)
lok max {$\frac\pi2+2k\pi,k\in\mathbb{Z}$}
lok min {$\frac{3\pi}2+2k\pi,k\in\mathbb{Z}$}
$sin(-\frac\pi2)=-sin\frac\pi2=-1$
$sin(-\pi)=0$