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Cameronmx9
 4 years ago
How to put y=4cos(x) in X= form?
Cameronmx9
 4 years ago
How to put y=4cos(x) in X= form?

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BlingBlong
 4 years ago
Best ResponseYou've already chosen the best response.1It is only allowed in said domain in order to make it the inverse function (It needs to pass the horizontal line test)

BlingBlong
 4 years ago
Best ResponseYou've already chosen the best response.1Inverse y = 4cos(x) x/4 = 4cos(x)/4 y/4 = cos(x) take inverse of each side arccos(y/4) = arccos(cos(x)) arccos(y/4) = 1x arccos(y/4) = x Remember that arccos is the inverse function of cos(x) and is limited to the domain [0, pi]

BlingBlong
 4 years ago
Best ResponseYou've already chosen the best response.1ignore the mistake i made in the variables

Cameronmx9
 4 years ago
Best ResponseYou've already chosen the best response.0Here is the problem I'm working at:

Cameronmx9
 4 years ago
Best ResponseYou've already chosen the best response.0Find the volume of the solid generated by revolving the described region about the given axis: The region in the first quadrant bounded above by the line y=4 and by the curve y=4sin(x) for the interval 0≤x≤π2 about the line y=4

Cameronmx9
 4 years ago
Best ResponseYou've already chosen the best response.0I think I'm using the crosssection method, but am not too sure on the radius.

Cameronmx9
 4 years ago
Best ResponseYou've already chosen the best response.0Which I think would be (44sin(x)

BlingBlong
 4 years ago
Best ResponseYou've already chosen the best response.1Wait do you want 4sin(x) to equal 4?

Cameronmx9
 4 years ago
Best ResponseYou've already chosen the best response.0I'm honestly not too sure on where to start with this problem.

BlingBlong
 4 years ago
Best ResponseYou've already chosen the best response.1I'm confused by your question but if you want it to equal four you can use the unit circle and think where is cos(x) = 1, the answer being pi

Cameronmx9
 4 years ago
Best ResponseYou've already chosen the best response.0Are you familiar with solids of rotation?

BlingBlong
 4 years ago
Best ResponseYou've already chosen the best response.1tbh no I know trig functions though but meh you should ask in chat for help

Cameronmx9
 4 years ago
Best ResponseYou've already chosen the best response.0haha alright, thanks for the help

Cameronmx9
 4 years ago
Best ResponseYou've already chosen the best response.0@Cinar, do you know which method I would use here?

cinar
 4 years ago
Best ResponseYou've already chosen the best response.0little bit (: I am trying to find it

cinar
 4 years ago
Best ResponseYou've already chosen the best response.0what is the rotation axis?

Cameronmx9
 4 years ago
Best ResponseYou've already chosen the best response.0so I'm thinking the radius is (44sin(x))

cinar
 4 years ago
Best ResponseYou've already chosen the best response.0\[V=\pi \int\limits_{0}^{2\pi}(44\sin x)^2dx\]
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