Sunday

March 29, 2015

March 29, 2015

Posted by **Jamie** on Tuesday, January 16, 2007 at 4:55pm.

It's 3/2 but I am not very clear on how to obtain the answer. I changed arctan x/2 into dy/dx=(4-2x)/(4sqrt(4+x^2)) but that's as far as I got. Could you please show me how to solve this problem? I would really appreciate it?

Start with this rule:

d/dx (arctan x)

= 1/(1 +x^2)

d/dx (arctan x/2) = (1/2)/[1 + (x/2)^2]

Evaluate them at x = 0 and add them. You will get 3/2.

**Answer this Question**

**Related Questions**

precal - The values of x that are solutions to the equation cos^(2)x=sin2x in ...

Calculus - Note that pi lim arctan(x ) = ---- x -> +oo 2 Now evaluate / pi \ ...

calculus - Find the exact value of: cos(arctan(2) + arctan(3)) Please explain ...

Math - Arrange these in order from least to greatest: arctan(-sqrt3), arctan 0, ...

calc - also: integral of tan^(-1)y dy how is integration of parts used in that? ...

calculus - h(x)= integral from (1, 1/x) arctan(2t)dt part 1: let U= 1/x and du...

calculus - h(x)= integral from (1, 1/x) arctan(2t)dt part 1: let U= 1/x and du...

solving trigonometrical equations - arctan(tan(2pi/3) thanks. arctan(tan(2pi/3...

calculus - Now we prove Machin's formula using the tangent addition formula: tan...

Trig - URGENT, Please answer this question: give the value of: Tan(Arctan x+1/x-...