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2 years ago

|3x−2|=19 please help quick thanks

Mathematics

2 answers:

12345 [234]2 years ago

7 0

Answer:

x=7,-17/3

Step-by-step explanation:

Westkost [7]2 years ago

6 0

Hey there
The answer for X=7 here is the equation
[3x5-2]=19

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Answer:

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Step-by-step explanation:

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sin alpha = 7/25, alpha lies in quadrant ii, and cos beta = 2/5, beta lies in quadrant i. find cos(alpha-beta).

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Answer:

Therefore $\cos(\alpha-\beta)=\frac{48+7\sqrt{25}}{125}$

Step-by-step explanation:

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$\sin^2x+\cos^2=1$

$\cos \alpha=\sqrt{1-\sin^2\alpha}$

$\cos \alpha=\sqrt{1-(\frac{7}{25})^2}$

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$\cos \alpha=\sqrt{\frac{576}{625}}$

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$\sin \beta=\sqrt{1-\frac{4}{25}}$

$\sin \beta=\frac{\sqrt{21}}{5}$

$\cos(\alpha-\beta)=\cos\alpha\cos\beta+\sin\alpha\sin\beta$

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