First Partial Derivative of f(x,y)=arctan (y/x)

In summary, the conversation is about finding the first partial derivative of a function, specifically f(x,y)=arctan (y/x). The responder suggests going back to a calculus textbook to review the method for finding the derivative of arctan(x). The original asker also mentions a website, quickmath.com, that can help with derivatives, integrals, and other math problems. However, the responder advises that those seeking help on this site should post their own work before receiving assistance.
  • #1
teng125
416
0
f(x,y)=arctan (y/x).
may i know what is the first partial derivative of this??

thanx
 
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  • #2
Go back to your first calculus textbook and re-study the method of finding the derivative of Arctg(x).
 
  • #3
teng125 said:
f(x,y)=arctan (y/x).
may i know what is the first partial derivative of this??

thanx

First partial derivative with respect to what? You have to know which variable you are taking the derivative with respect to when you try to find the partial derivative of a function of several variables.
 
  • #4
If you wish simply to get answers, go to www.quickmath.com it will do derivatives, integrals etc., for the above problem use http://www.hostsrv.com/webmab/app1/MSP/quickmath/02/pageGenerate?site=quickmath&s1=calculus&s2=differentiate&s3=advanced .

Those who would help you here will require that you post some work (anything, an attempt, even if it is wrong) before they will respond.
 
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  • #5
This site is amazing! I'm in love!
 

Related to First Partial Derivative of f(x,y)=arctan (y/x)

1. What is the formula for the first partial derivative of f(x,y)=arctan (y/x)?

The formula for the first partial derivative of f(x,y)=arctan (y/x) is ∂f/∂x = -y/(x^2 + y^2).

2. How do you find the first partial derivative of f(x,y)=arctan (y/x)?

To find the first partial derivative of f(x,y)=arctan (y/x), take the partial derivative with respect to x while treating y as a constant. This will result in ∂f/∂x = -y/(x^2 + y^2).

3. What does the first partial derivative of f(x,y)=arctan (y/x) represent?

The first partial derivative of f(x,y)=arctan (y/x) represents the rate of change of the function with respect to x, while holding y constant. In other words, it shows how much the value of the function changes as x changes, with y remaining fixed.

4. Can the first partial derivative of f(x,y)=arctan (y/x) be negative?

Yes, the first partial derivative of f(x,y)=arctan (y/x) can be negative. This indicates that the function is decreasing as x increases, with y remaining constant.

5. How is the first partial derivative of f(x,y)=arctan (y/x) useful in real-world applications?

The first partial derivative of f(x,y)=arctan (y/x) can be used to calculate the slope of a tangent line to the function at a specific point. This can be useful in fields such as physics, engineering, and economics, where rates of change and slopes are important in understanding and predicting real-world phenomena.

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