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3 years ago

What is the exact value of tan (StartFraction 5 pi Over 8 EndFraction)

Mathematics

2 answers:

Greeley [361]3 years ago

5 0

Answer:

Step-by-step explanation:

HOPE IT HELPS MUCH UNTO YOU

melisa1 [442]3 years ago

4 0

9514 1404 393

Answer:

(d) -√((2+√2)/(2-√2))

Step-by-step explanation:

5π/8 is a 2nd-quadrant angle whose reference angle is greater than π/4. This means the tangent is negative with a magnitude greater than 1. The only reasonable choice is ...

$\displaystyle -\sqrt{\frac{2+\sqrt{2}}{2-\sqrt{2}}}$

_____

Additional comment

This simplifies to -(1+√2). Your calculator can verify the choice for you.

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What is the equation of the best-fitting regression line? Find this in two ways. First, using the regression analysis part of th

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Step-by-step explanation:

Regression analysis is used to infer about the relationship between two or more variables.

The line of best fit is a straight line representing the regression equation on a scatter plot. The may pass through either some point or all points or none of the points.

Method 1:

Using regression analysis the line of best fit is: $y=\alpha +\beta x+e$

Here α = intercept, β = slope and e = error.

The formula to compute the intercept is:

$\alpha =\bar y-\beta \bar x$

Here $\bar y$ and $\bar x$ are mean of the y and x values respectively.

$\bar y=\frac{\sum y_{i}}{n} \\\bar x=\frac{\sum x_{i}}{n}$

The formula to compute the slope is:

$\beta =\frac{\sum (x-\bar x)(y - \bar y)}{\sum (x=\bar x)^{2}}$

And the formula to compute the error is:

$e=y-\alpha -\beta x$

Method 2:

The regression line can be determined using the descriptive statistics mean, standard deviation and correlation.

The equation of the line of best fit is:

$(y-\bar y)=r\frac{\sigma_{x}}{\sigma_{y}} (x-\bar x)$

Here r = correlation coefficient = $r=\frac{Cov (x,y)}{\sqrt{\sigma^{2}_{x}\sigma^{2}_{y}} }$

$\sigma_{x}$ and $\sigma_{y}$ are standard deviation of x and y respectively.

$\sigma_{x}=\frac{1}{n}\sum (x-\bar x)^{2} \\\sigma_{y}=\frac{1}{n}\sum (y-\bar y)^{2}$

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3 years ago

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ehidna [41]

Seven seconds is the answer any more

7 0

3 years ago

Please help and stop with the links!

ira [324]

It C)
This is because the sum of the two smaller sides in a triangle has to be larger than the bigger sides. 10+12=22.
22 is smaller than 24 which is the third side this no triangle is formed

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3 years ago

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Bumek [7]

It affect the sum by being the higher number

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4 years ago

Hell help me out thank youuuuuu byeee

Crank

Answer:

if im right its number 4!! if its not right sorry i did the math and thats what i got!!

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3 years ago