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  1. But WHY is this the derivative of arctan (x)? : r/askmath - Reddit

    Oct 29, 2020 · 75 votes, 19 comments. 150K subscribers in the askmath community. This subreddit is for questions of a mathematical nature. Please read the subreddit…

  2. Derivative of arctan? : r/learnmath - Reddit

    Nov 30, 2019 · Specifically, when you are trying to find the derivative of y=arctan (x), you are finding the derivative with respect to x. So the derivative of x with respect to x is 1. But we can't say the …

  3. Why is arctan (x) + C the antiderivative of (x^2 + 1)^ (-1)?

    Next, the derivative of tan (x) is sec 2 (x), which follows from the quotient rule and the derivative for sine and cosine. So we next want to implicitly differentiate the equation tan (arctan (x))=x with respect to x.

  4. derivative of arctan is confusing : r/calculus - Reddit

    Aug 27, 2021 · The first statement is incorrect. Taking the derivative of atan (u/a) w.r.t. u gives a/ (a 2 + u 2) because of the chain rule. This is why you have an extra factor of 1/a when taking the integral of …

  5. What is the derivative of arctan (x-1)? | Socratic

    What is the derivative of arctan(x − 1)? Calculus Differentiating Trigonometric Functions Differentiating Inverse Trigonometric Functions

  6. [Multivariable Calculus] Some second partial derivative problems

    Sep 16, 2013 · I'm supposed to find all second partial derivatives of z=arctan ( (x+y)/ (1-xy)) The first step to finding all second partial derivatives is finding all first partial derivatives. When you find a …

  7. Confusion about integrals that integrate into inverse trig functions ...

    Sep 30, 2019 · Two-part question: First, if you didn't know the derivatives of inverse trig functions ahead of time, specifically arctan, then how might you try to integrate 1/ (1+x 2)? Would integration by parts …

  8. Any intuitive explanation of why the integral of 1/ (1+x^2)dx = arctan ...

    Let y=arctan (x). This is equivalent to tan (y)=x, then you can use implicit differentiation to take the derivative , solve for y', then use the previous equality to solve for y as a function of x by making a …

  9. r/learnmath doesn't allow pictures and I'm lazy. why is the ... - Reddit

    The integrand is the derivative of arctan. So what you're basically doing is turning it back into arctan and evaluating the difference between arctan (∞) and arctan (-∞) which is π/2 minus -π/2 which is π

  10. Answered: This problem illustrates the Second Derivative ... - bartleby

    This problem illustrates the Second Derivative Test. Let f (x) = - arctan (x²) + 3 . (a) Find f' (x) = X - 2x 1 + x 4 (b) Find the critical point of f (x).

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