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oh i can do it now~ thankss anyway guys :)

thankyou guys, can you also do this for me? An observer sees a plane directly overhead, 2km above the ground. The plane is moving horizontally at a constant speed of 500km/h. Find the rate at which the distance will be increasing between the observer and the plane when the distance between...

1.) A 4m long ladder is leaning against a wall. Its base is slipping away from the wall at a constant rate of 2m/s. At what rate, to 2 decimal places, will the top of the aldder be slipping down the wall when the base is 1m out from the wall? (ans: moving down at the rate of 0.52m/s) 2.) A...

oo thanks a lot love you guys as always!

also this one** integral (pi/2 -> 0 ) sin^nx cos^2x dx show that In = (n-1)/(n+2) In-2

In = integral (x -> 0) (1+t^2)^n dt for n = 1,2,3 ... show that In = 1/(2n+1) (1+x^2)^n x + 2n/(2n+1) (In-1) THANKS HEAPSS

thanks heaps guys

Re: I screwed up my half yearlies ************** With reference to the physical principles involved, explain the operation of the galvanometer (3marks) Faraday's Law states that when there is a change in flux, a voltage will be induced. (This bit is wrong i should say motor effect. My...

Re: I screwed up my half yearlies OMG LOL! is this andy?

oh i can do the first one now =D can anyone do the second one for me please?

These are the integration by parts questions: 1.) integrate sec^5(x) dx 2.) integrate cosec^2 (sqrt x) dx THANKS A LOT =(

how did u get the middle part? what is [ tan^-1 (5/sqrt2) - tan^-1 (1/sqrt2) ] ?

may i also ask, how can u know that integrate x / sqrt (1-x^2) is - squrt 1-x^2 so quickly ??

okayy i think the answer is wrong dw thanks a lot anyway :)

I cant get any extra marks :'( she said i was playing with words and being ambiguous :( she said when i was talking about torque. i should stick with the parallel idea : ( hate her!!!!!

ye the ans is -4 square root 3 + 3 ln ( 5+3sqrt3 / 1+3sqrt3) :(

oh no cant do it :( i do it up to: 3/sqrt2 [ tan^-1 5/sqrt2 - tan^-1 1/sqrt2] - ln9 anyone please help :'(

oh can do it now~ thankss :D

for the first question, wht happen if the limit is 0 to 4? coz when u sub it in i cant get the answer ;( the answer is -4 square root 3 + 3 ln ( 5+3sqrt3 / 1+3sqrt3) thanks againn

thanks a lott~~ love you guys <3