Solve for all possible values of x. √x-8-3=1Ox= -4O - id83146747853, maddieberridgeowud2s

Ответ:

20170020

28.01.2022

x = 24

Step-by-step explanation:

$\sqrt{x - 8} - 3 = 1 \\ \sqrt{x - 8} = 1 + 3 \\ \sqrt{x - 8} = 4 \\ squaring \: both \: sides \: \\ {( \sqrt{x - 8)} }^{2} = {4}^{2} \\ x - 8 = 16 \\ x = 16 + 8 \\ \huge \red{ \boxed{x = 24}}$

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Ответ:

hannahgracew12

25.03.2022

Mathematics

$\cos(x+y) + \cos(x-y) = 2\cos x \cos y$ cosine subtraction and addition identities: $\begin{aligned} \cos(x+y) & = \cos x \cos y - \sin x \sin y \\ \cos(x-y) & = \cos x \cos y + \sin x \sin y \end{aligned}$ so $\begin{aligned} \text{lhs} & = \cos(x+y) + \cos(x-y) \\ & = \left(\cos x \cos y - \sin x \sin y\right) + \left(\cos x \cos y + \sin x \sin y\right) \\ & = \cos x \cos y \boxed{- \sin x \sin y} + \cos x \cos y + \boxed{\sin x \sin y} \end{aligned}$ those are like terms that cancel each other out. $\begin{aligned} \text{lhs} & = \cos x \cos y+ \cos x \cos y \\ & =2\cos x \cos y \\ & = \text{rhs} \end{aligned}$

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Solve for all possible values of x. √x-8-3=1
Ox= -4
O x = 8
O x = 12
Ox= 24

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Solve for all possible values of x. √x-8-3=1Ox= -4O x = 8O x = 12Ox= 24

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Solve for all possible values of x. √x-8-3=1
Ox= -4
O x = 8
O x = 12
Ox= 24