Damn, but x can't equal to pi/2
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2014 HSC Mathematics Solutions (3 Viewers)
- Thread starter ymcaec
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bongoli
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b5 is 64-66 probs
i'd say b6 is anywhere between a 79-85
Really? Wouldn't it be undefined at that point?
Maybe OP can clarify?
No, the two functions are multiplied, hence the asymptotes of the standard tanx is no longer at pie/2. I've been using different graphical applications and they are showing 3 roots, same with wolfram alpha.
Oh wow I hope you are right. But would they expect you to consider all that in 2u?
Change in asymptotes etc
Hmm I see your point. Didn't pick it up while I was rushing through it.
It could be an open circle on the graph (i.e. approaching 0) so there might only be two solutions.
Don't know if it's a trick question or not haha. (doesn't look like it though)
So how would you determine the answer? Like Aaron said, wolfram alpha does show a root at pi/2. But my calc and a graphing calc says otherwise.
Would they end up putting 2 correct answers? That would be great
Confirming that these graphs can't pick up open circles, therefore I think the answer is B algebraically but hoping C cos I spent so much time graphing it lol
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Chocolatebubble
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Don't some papers have answers like "B OR C"?Confirming that these graphs can't pick up open circles, therefore I think the answer is B algebraically but hoping C cos I spent so much time graphing it lol
I've seen many science papers have 2 or even 0 answers but this is something the mathemagicians will decide.
chrisdelinet
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agreed, i hope there will be a huge debate going over a bostes atm. it'll be war with protractors flying, calculators smashing, circles destroyed, etc.
chrisdelinet
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wow, now that will be something ...
Carrotsticks
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The answer for question 7 is (B) without a doubt.
I'm not too sure why there is so much debate going on here over that, as x clearly cannot be pi/2. I addressed this silly error in the multiple choice of my BOS Trials for 2U as well, this very same trap.
I'm not too sure why there is so much debate going on here over that, as x clearly cannot be pi/2. I addressed this silly error in the multiple choice of my BOS Trials for 2U as well, this very same trap.
bongoli
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Why can't x= pi/2 ?
Cos tan(pi/2) is undefined. Well there goes my atar.
enigma_1
~~~~ Miss Cricket ~~~~
what a retarded question
I just realised what you guys are on about with the tan pi/2 thing
(((#typicalbostes
Already lost 10 marks, without sillies, fmlwhat a retarded question
I just realised what you guys are on about with the tan pi/2 thing
#typicalbostes
enigma_1
~~~~ Miss Cricket ~~~~
Same
((((