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Mathematics: Post your doubts here!
q10 part 1 for oct/nov (Lim from 0 to 1) Int(u^(n+2) + u^n) converting the limits, tan(pi/4)= 1 tan(0)=0 converting dx into du, u=tanx => du/dx= sec^2(x)= 1+tan^2(x) dx= du/1+u^2 Now, lim(0-1) int[u^n(u^2 + 1)]/ (u^2 + 1) (u^2 +1) cancels out. so youre left with int(u^n)du = u^n+1/n+1... -
Mathematics: Post your doubts here!
Well, For the stats question: They say there's 600 feathers, with 63 less than 6 cm, 155 more than 12 cm. so for P(X<6)= 63/600=0.105 and for P(X>12)= 155/600=0.258 (by checking from the normal distribution table you'd see theres no 0.105 or 0.258! so you gotta subtract them from 1)... -
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Mathematics: Post your doubts here!
Gradient = dy/dx = PN/TN= tanx = 1/2(PN)(TN) For part (i): Rearrange PN/TN = tanx to give TN= PN/tanx Substitute this into Area of the triangle (1/2 PN*TN) which gives 1/2* (PN)*(PN/tanx) Note that PN= y. So it goes down to 1/2. y^2. cotx Now for part (ii): Separate the variables and... -
Mathematics: Post your doubts here!
There's no Q6 part (iii) in may june 2012 P61.. -
Mathematics: Post your doubts here!
LOOL. PLEEASSEE DUDE. I swear I think its easy! :P I find mechanics harder seriously. -
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Mathematics: Post your doubts here!
I'm so happy I already gave mechanics exam last year. Stats FTW. it's so easy. :') -
Mathematics: Post your doubts here!
Rate of flow of the liquid into the tank: 80 Rate of flow of the liquid out of the tank: kV Rate of change of liquid in the tank= 80-kV dV/dt= 80 -kV dV/(80-kV) = dt = ∫ dV/(80-kV) = ∫ dt = -1/k ln(80-kV) = t = ln(80-kV) = -kt = 80-kV= e^(-kt) + c (N.B: c = o) = -kV= -80+ e^(-kt) = V=... -
Mathematics: Post your doubts here!
Im guessing that's supposed to be a " . " in place of " x "? 'cause their cross product is definitely not a 0. Well, thanks anyways! -
Mathematics: Post your doubts here!
I hope its clear enough that you can read it :p My webcam sucks and my cell wont connect to my laptop! :/// -
Mathematics: Post your doubts here!
Asking you why my method is wrong -
Mathematics: Post your doubts here!
But for the same question daredevil asked, why doesn't my method work? Here's the method sumeru: Since they ask for the shortest distance from the point p to the line that lies ON the plane, so we can use the normal vector of the plane as the directional vector for the line equation PX, where X... -
Mathematics: Post your doubts here!
http://www.netcomuk.co.uk/~jenolive/vect18e.html Here's a detailed method and I'm getting sqrt[5] using this. I did method 2. -
Mathematics: Post your doubts here!
Oct Nov 2007, Q7, part (ii) Why are we supposed to use the radian mode instead of degree mode? http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w07_qp_3.pdf -
Mathematics: Post your doubts here!
Dude, you're a genius. You must be taking Further Maths Lel. -
Mathematics: Post your doubts here!
Oct Nov 2007, Q7, part (ii) Why are we supposed to use the radian mode instead of degree mode? http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w07_qp_3.pdf -
Mathematics: Post your doubts here!
So basically, what I did is correct as well? cause its just the reverse of what you did. -
Mathematics: Post your doubts here!
Could you do the "show" part in the same question as well? Well, Ik that |z-2i| = 4 is gonna go to: a^2 + b^2 -4b +4 = 16 a^2 + b^2 -4b -12 = 0 which is same as zz* - 2iz* + 2iz -12= o. But is this enough to show what theyre asking for?