Kevin C. answered • 04/09/13

Successful Math Tutor -- Recently retired high school math teacher

int (1/(1+u^2) du = arc tan u + c

Therefore int (4/(1+x^2) dx = 4(arc tan x) evaluated from x = -1 to 0.

I hope this helps.

Kevin

Bob R.

asked • 04/09/13Need help figuring this out.

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Kevin C. answered • 04/09/13

Successful Math Tutor -- Recently retired high school math teacher

int (1/(1+u^2) du = arc tan u + c

Therefore int (4/(1+x^2) dx = 4(arc tan x) evaluated from x = -1 to 0.

I hope this helps.

Kevin

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John C.

09/23/13