Search results

  1. C

    When do lecture slides get uploaded

    When do the lecture slides get uploaded onto utsonline? I always thought it would be at least a day before so i can print and take notes on them...but it seems to be like an hour before or something...so i can't print it before the lectures
  2. C

    mechanics quesiton

    Can anyone show me how to solve these questions?
  3. C

    graphs help

    Can anyone explain how to do these types of graphs? F(1/x) F(x^2)
  4. C

    integration questions

    please help solve:) integrate: by substitution: 1) dx/(x sqrt(x^2-4)) [x=1/u] 2) dx/[(a^2-x^2)^(3/2)] [x=asintheta] 3)(e^2x)dx/(e^4x -1) [u=e^2x] 4) cosx dx /(1+sinx)(2+sinx) by parts: 1)cos^4(x) 2)x(inverse tanx) 3) log(a^2+x^2) and....write as partial fraction: 1/(x^4 +1)...
  5. C

    what to do?

    This year, my english teacher left the school and so now we have another teacher. The problem is, she doesn't seem to know much about the english course. We've done frankenstien and speeches with her. For frankenstein, she just got us to read parts of the book every lesson, then watch...
  6. C

    help integration

    Please help solve. The sheet they come from didn't have answers =( Integrate: 1. (2x+3)/sqrt(x^2+2X+3) 2. (5t^2+3)/t(t^2+1) 3. sqwiggle thing root 3 and -1 (definite integral): X^2/sqrt(4-x^2) 4. (3x^2 -8x^3-19x-14)/(x-3)(x^2+2) thanks people
  7. C

    misc

    1)Find general solution: sin 3x = sin 2 x 2) Graph |x|-|y| = 1, explain.
  8. C

    simultaneous with complex

    Solve for z and w: 1) (2+i)z+(2-i)w=1 and (2-i)z+(2+i)w=2 [ans: z=(3/8)+(i/4) w=(3/8)-(i/4) ] 2) z+(1-i)w=2i and w+(1-i)z=1 [ans: z=1+i w=-1] thanks
  9. C

    some questions...

    1. In I-beams, why is it structurally acceptable to cut holes into the web but not into the flange? Why are holes cut? 2. A galvanized steel post is anchored to concrete by zinc cobalt coated bolts. Why are the nuts on the bolts significantly more corroded? 3. Shear Force and Bending Moments...
  10. C

    conics...

    1. Find the equation of the ellipse with centre the origin and foci at points (-5root3,0) and (5root3,0), given that it passes through the point (8,3) Ans:x^2 +4y^2=100 2. P is the point (acostheta,bsintheta) on the ellipse E: [general form of ellipse eqn] with eccentricity e and foci S,S'...
  11. C

    service property vs engineering property?

    Can some one explain the difference between those two? examples? confused...Thanks
  12. C

    drop or not...

    Ok, another BOSer deciding subjects. Here's my senario: I do 12 units - english adv,maths 4u, chemistry, legal and IPT Thinking whether to drop IPT, 4u maths, or keep both. I know the scaling is by far...but i don't care. I'm sorta finding 12 units too much - just enough to finish homework. why...
  13. C

    probability Q

    Integers less than 7000 are formed from the digits 2,4,6,7 and 9 with no repetitions allowed. If one of these is randomly chosen, find the probability that it is odd. Answer: 70/157
  14. C

    solutions to rochford book?

    I'm wondering if there are worked solutions to the "engineering studies workbook" by John rochford. Stuck on some questions and annoyed...
  15. C

    Parametric Q

    eliminate parameters and hence find cartesian equation: x=t+(1/t) and y= t^2+(1/t^2) answer: x^2 -2 what shape is it?
  16. C

    trig complex Q

    Given that (n-1)Sigma(K=0) cos(K.theta) + i(n-1)Sigma(k=0) sin(K.theta) = (1-z^n)/(1-z). 1) Prove that: (n-1)sigma(k=0) cos(K.theta) = (sin((n.theta)/2)cos(((n-1)theta)/s)) / (sin(theta/2) and (n-1)sigma(k=0) sin(K.theta) = (sin((n.theta)/2)sin(((n-1)theta)/s)) / (sin(theta/2) 2)hence deduce...
  17. C

    patel complex help

    I need help with questions 10 and 11 in exercise 4K from the patel book. Here are the questions: 10. find the modulus and argument of each of the complex numbers z and w. z= (1+i)/(1-i) and w=(root2)/(1-i) Plot the points representing z, w and z+w on argand diagram. Deduce, from the...
Top