vault backup: 2024-10-02 11:02:50
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@ -76,11 +76,18 @@ Given the form $y = A\tan(Bx - C) + D$ (the same applies for $\cot$)
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- The vertical shift is $D$
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- The vertical shift is $D$
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# Secant
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# Secant
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$$ y = \sec{x} $$
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$$ y = \sec(x) $$
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![Graph of secant](assets/graphsec.jpg)
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![Graph of secant](assets/graphsec.jpg)
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$$ sec(x) = \frac{1}{\cos{x}} $$
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$$ sec(x) = \frac{1}{\cos{x}} $$
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Because secant is the reciprocal of cosine, when $\cos{x} = 0$, then secant is undefined. $
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Because secant is the reciprocal of cosine, when $\cos{x} = 0$, then secant is undefined. $|\cos$| is never *greater than* 1, so secant is never *less than* 1 in absolute value. When the graph of cosine crosses the x axis, an asymptote for a matching graph of secant will appear there.
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The general form of secant is:
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$$ y = A\sec(B{x} - C) + D $$
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$A$, $B$, $C$, and $D$ will have similar meanings to the secant functions as they did to the sine and cosine functions.
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# Cosecant
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$$ y = \csc(x) $$
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# Examples
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# Examples
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> Given $-2\tan(\pi*x + \pi) - 1$
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> Given $-2\tan(\pi*x + \pi) - 1$
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