Recent content by vantz

S=A + B S2=(A+B)2 S.S=(A+B).(A+B) ... etc

i showed the relation between the original limit and [xy]/(x^2+y^2) as (x,y)-->(0,0). numerator factorizes to y(x-1), then i replaced (x-1) with t, and as x→1, t→0. new limit does not exist because it approaches 1/2 and 0.

oh so first i rewrite the limit into a more familiar one and then solve. but i don't see how they are related. edit:nvm i got it.

im still approaching 0 when x=y

Homework Statement The Attempt at a Solution it does not exist, but i can't get different limits, I am only getting it approaches 0 i replaced x=1 only, y=0 only, y=x, x=y but I'm only getting 0 as my limit. thanks

what's the proof? I can't understand why this is the case Thank you

Why are the integration bounds from -pi/2 to pi/2 and not 0 to pi?

i'm just trying to locate them in the textbook, so basically i'd like to know which section they belong in thanks for the help so far It would be a good idea to have an index of formulas in textbooks

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Hello, How is Taking the derivative on the top and bottom makes it go in circles Thank you

I have it now. Thank you

I don't understand, wouldn't that be illegal to do?

Homework Statement Homework Equations The Attempt at a Solution I'm trying to rewrite the integral as shown Most probably a real simple answer Thank you