Precalculus Archive: Questions from April 10, 2023
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8. Find \( d^{2} y / d x^{2} \) at \( x=2 \) a) \( y=x^{2}(\sqrt{x+2}) \) b) \( y=3 x^{2}-\frac{4}{\sqrt{x}} \)2 answers -
6. Halle el valor exacto de \[ \tan \left(\operatorname{sen}^{-1}\left(-\frac{7}{25}\right)-\cos ^{-1}\left(\frac{3}{5}\right)\right) \]2 answers -
please do all 3 thank you!!! :( <3 dont have more information
2. Si \( \csc (\boldsymbol{\theta})=\boldsymbol{u} \), entonces \( \cot (\boldsymbol{\theta}) \) es: a. \( \sqrt{1-u^{2}} \) b. \( \frac{1}{\sqrt{1-u^{2}}} \) c. \( \sqrt{u^{2}-1} \) d. \( \frac{1}{\s2 answers -
7. Halle el valor exacto de (a) \( \cos \left(2 \tan ^{-1}\left(\frac{\sqrt{5}}{4}\right)\right) \) (b) \( \operatorname{sen}\left(\frac{1}{2} \cos ^{-1}\left(\frac{5}{8}\right)\right) \)2 answers -
6. Verifique las siguientes identidades. (a) \( \frac{\operatorname{sen}\left(\frac{\alpha}{2}\right)}{\cos \left(\frac{\alpha}{2}\right)}=\frac{\cos \alpha-\cos 2 \alpha}{\operatorname{sen} \alpha+\o2 answers -
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Encuentra el vértice, el foco y la directriz de la parábola y dibuja la gráfica (y + 5)^2 = -6x + 120 answers
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1. Halle los valores exactos usando las fórmulas de suma o resta (a) \( \tan \left(255^{\circ}\right) \) (b) \( \operatorname{sen}\left(\frac{17 \pi}{12}\right) \) (c) \( \cos \left(165^{\circ}\right2 answers -
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\( \begin{array}{l}y=\sec (x) \\ y=\cot (x) \\ y=\sin (x) \\ y=\tan (x) \\ y=\cos (x) \\ y=\csc (x)\end{array} \)2 answers -
\[ \cos x(\tan x-\sec x)=\sin x-1 \] \[ \frac{\cos ^{2} x}{\sin x}=\csc x-\left(\sin ^{3} x+\cos ^{2} x \sin x\right) \] c) \( \frac{1}{1+\tan ^{2} x}=1-\sin ^{2} x \)2 answers -
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Verifique la siguiente identidad
(c) \( \cos ^{2} x+\frac{1}{1+\sec x}+\operatorname{sen}^{2} x=\sec x \)2 answers -
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Find the following. (a) \( \lim _{t \rightarrow \infty}\left(t^{-6}+7\right) \) \[ \lim _{t \rightarrow \infty}\left(t^{-6}+7\right)= \] (b) \( \lim _{y \rightarrow-\infty}\left(8-9 y^{-2}\right) \) \2 answers -
Verify the Identity. \[ \begin{array}{l} \sin ^{6}(\beta)+\cos ^{6}(\beta)=1-3 \sin ^{2}(\beta) \cos ^{2}(\beta) \\ \sin ^{6}(\beta)+\cos ^{6}(\beta)=\left(\sin ^{2}(\beta)+\cos ^{2}(\beta)\right)\lef2 answers -
I need help!!
Halla los valores de \( x,-2 \pi \leq x \leq 2 \pi \) para los cuales \( \csc (x)=-1 \) For the toolbar, press ALT+F10 \( (\mathrm{PC}) \) or \( \mathrm{ALT}+\mathrm{FN}+\mathrm{F} 10(\mathrm{MaC}) \)2 answers -
4 Simplify (Ch.7.2) \[ \sin \left(25^{\circ}\right) \cos \left(35^{\circ}\right)+\sin \left(35^{\circ}\right) \cos \left(25^{\circ}\right) \]2 answers