Q13 (2 Viewers)

Nooblet94

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Just checked on wolframalpha and it's 22 something. Ugh.
 

GoldyOrNugget

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RishBonjour same here =\ what external mark do you reckon 68/70 will get?
 

osak23

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for cii) i got some shitty figure but rounded off to 2 d.p : 1.5 s

for d) i) 5 hours
ii) i just did 1 application of newtons method and got t=25hrs???
i think its wrong..didnt get wtf the 0.3mg/l is?

will i get a mark for doing 1 application of newtons though??
 

RishBonjour

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How do you actually do it though? I used x = Ancos(nt + alpha) but im guessing that probably wrong. From memory alpha ended up being inverse tan(-4/3) ?
I think it was Ancos(nt - alpha) and you should get 1.511.
(although you could do it with sine, doesn't matter)
 

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