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uysha [10]
3 years ago
13

Use the slope y-intercept to graph the equation. y=-4/5x+4

Mathematics
1 answer:
yulyashka [42]3 years ago
6 0
This should be right that’s if I did it right

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Step-by-step explanation:

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3 years ago
5+ 3 cos ½x = 7<br>how to find the x?​
Anon25 [30]

Answer:

x=\pm 2 arcos(\frac{2}{3})+4k\pi

where k is an integer

Step-by-step explanation:

5+3\cos(\frac{1}{2}x)=7

We are going to isolate the trig expression first.

Subtract 5 on both sides:

3\cos(\frac{1}{2}x)=2

Divide both sides by 3:

\cos(\frac{1}{2}x)=\frac{2}{3}

Now since \cos(u) is even then \cos(u)=\cos(-u).

So we have:

\cos(\frac{1}{2}x)=\frac{2}{3}

implies:

\frac{1}{2}x=arccos(\frac{2}{3})+2k\pi

Multiply both sides by 2:

x=2arccos(\frac{2}{3})+4k\pi

or

-\frac{1}{2}x=arcos(\frac{2}{3})+2k\pi

Multiply both sides by -2:

x=-2arccos(\frac{2}{3})-4k\pi

So we can say the solution is:

x=\pm 2arcos(\frac{2}{3})+4k\pi

(k is an integer)

5 0
3 years ago
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