4 years ago

Part A

Mathematics

1 answer:

igor_vitrenko [27]4 years ago

5 0

Answer:

Step-by-step explanation:

you pick your topic

the what is what is your topic

where does your topic take place

who is in your topic or who is it talking about

why did you choose this topic

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Find the x-values that are solutions of the equation 5cot^2x-15=0

julia-pushkina [17]

First solve for the trig function 'cot'
$cot^2 x = \frac{15}{5} = 3$

Next take the sqrt of both sides (include plus/minus)
$cot x = \pm \sqrt{3}$

Now take reciprocal of both sides, this will change trig function to 'tan'
(cot = 1/tan)

$tan x = \pm \frac{1}{\sqrt{3}} = \pm \frac{\sqrt{3}}{3}$

Finally use the unit circle or inverse tan on your calculator to find x.
There will be 4 solutions, one for each quadrant.

$x = \frac{\pi}{6}, \frac{5\pi}{6}, \frac{7\pi}{6}, \frac{11\pi}{6}$

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3 years ago

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vova2212 [387]

Step-by-step explanation:

x=y+9

substitute

3(y+9)+8y=-6

3y+27+8y= -6

13y = -6 -27

13y= -33

y = -33/13

x = -33/13 + 9

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2 years ago

Can you help me please

ikadub [295]

I think the second one but I’m not sure

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3 years ago

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Complete the solution of the equation . Find the value of y when x equals 15.

Dvinal [7]

The answer is. y= -6

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Financial algebra: Karen wants to make a deposit of $500 each week into an account that earns %5 interest compounded weekly(52 w

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3 years ago