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how would you simplify something like atan(2) - atan(0.5)??? do the same laws as logs apply?? thanks

hey can someone please help me out with this question? its Q10 of 6.3 in terry lees book "the region enclosed by the rhombus ABCD, where A(0,2) B(1,0) C(0,-2) D(-1,0) is rotated about the line x=2 to form a solid. Find the volume" i broke it up 2 integrals above the x-axis then found each...

hey sorry to ask a pretty silly question but: is there a theorem or somehting i should no about the intersectionof the altitudes in a triangle from each vertices will they always all intersect at the same point? cause im doin a question and i proved it showing the intersection of all three...

hey can someone show me how to find the general solutions of sin x + cos x =1? i got x= npi and x=2npi +/- pi/2 but the answer in x=2npi and x=2npi + pi/2 thanks

hey i have what seems like a pretty easy question. but i keep getting it wrong and i dont understand terry lee's working out the question is : 3x-2y-1=0 is a chord of the ellipse x^2 + 4y^2 = 9. find the co-ordinates of its midpoint terry lee says 2y = 3x-1 so then he subs it into the ellipse...

can someone tell me the horizontal asymptotes of y=1/arctanx? thanks

can someone tell me if this means what i think? does it mean parametrics arent in the sylaabus any more http://www.boardofstudies.nsw.edu.au/syllabus_hsc/pdf_doc/maths-st6-calculus-dwb.pdf Parametric representation of the parabola has not been included in the revised Mathematics Extension 1...

hey i was just wondering if anyone knows if oblique asymptotes is part of the syllabus for ext 1?

hey can someone help me with this question please? its probably alot easier than i think it is but yeah.. π/6 ∫ sin4xcos2xdx -π/6 thanks for your help

So who went to his show at centennial how good was it!!! i love him and isnt g love the epitome of cool?

How many classes does everyone here get of 4 unit a week? i only get 3X40 min lessons a week. be awesome to get more