Section I: Multiple Choice (1 Viewer)

[1zephyr]

How do you guise memorise all of these answers in the exam o.0


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brah got the paper in my hot little hands

 

[Chocolatebubble]

a
b
d
c
b
d
c
c
a
d

pls 10/10

tanx -2 has 2 solutions in 2nd and 4th quadrant while sinx only has one answer pi/2 therefore 3

holy shit i thought sin had 2 answers and tan had 1 (still 3). thank you based multiple choice

 

[DanS]

Great. All right, I think, except for 2. I changed it from B to C, DON'T ASK. If only we didn't have a 15min blackout halfway thru...

a
c
d
c
b
d
c
c
a
d

 

[photastic]

a
b
d
c
b
d
c
c
a
d

pls 10/10



holy shit i thought sin had 2 answers and tan had 1 (still 3). thank you based multiple choice

10/10, state rank right here.

 

[DanS]

10/10, state rank right here.

hrrm, maybe... what about the other 90 marks?

 

[cafe_pink]

question 7 is b since tan(pi/2) doesn't exist if you sub it back into the equation

 

[vaimvaelk]

tanx -2 has 2 solutions in 2nd and 4th quadrant while sinx only has one answer pi/2 therefore 3

There are actually only 2 solutions, since when you sub pi/2 into the equation, you get no solution. This is because tan(pi/2) does not exist (sub tan(pi/2) in your calculator and you will get math error).

 

[onlyhereforestiamte]

Why do you need to tan (pi/2)? It was just inverse tan -2, which has two solutions
plus 1 solution for sine (pi/2)

Tan(pi/2) is undefined though, the tan curve

you get the pi/2 from the (sinx - 1) bracket, but in the end it doesnt matter since its undefined in the tan curve
oh well woops my bad LOL didnt bother checking like i usually do ^_^

 

[Chocolatebubble]

There are actually only 2 solutions, since when you sub pi/2 into the equation, you get no solution. This is because tan(pi/2) does not exist (sub tan(pi/2) in your calculator and you will get math error).

9/10 my streak has ended

funny story, I originally thought tan had no solutions and sin had 2 so b was going to be my answer. and i realise i'm wrong with both my assumptions

yis im gud at meth

 

[photastic]

9/10 my streak has ended

funny story, I originally thought tan had no solutions and sin had 2 so b was going to be my answer. and i realise i'm wrong with both my assumptions

yis im gud at meth

But wolfram alpha says 3 solutions. If not, draw the diagram between 0 and 2pie and you will see 3 roots.

 

[trungduong12]

But wolfram alpha says 3 solutions. If not, draw the diagram between 0 and 2pie and you will see 3 roots.

I drew the diagram :/

3 sols

Its C



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[Chocolatebubble]

But wolfram alpha says 3 solutions. If not, draw the diagram between 0 and 2pie and you will see 3 roots.

meth is messing with me

 

[trungduong12]

Some ppl got D for q5
XD

And everyone argues about q7 :/


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[chrisdelinet]

But wolfram alpha says 3 solutions. If not, draw the diagram between 0 and 2pie and you will see 3 roots.

well if you were to draw the graph you'll plug in pi/2, you get an undefined y value. therefore i presumed those straight line sections are in fact asymptotes. therefore thats why i put 2 solutions.... quite worried for this as it is one of the two marks that are ambiguous with me.

 

[chrisdelinet]

Some ppl got D for q5
XD

And everyone argues about q7 :/


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5 is definitely B, 7 is the one im worried bout

 

[trungduong12]

5 is definitely B, 7 is the one im worried bout

If 7 is C then i lost 2 marks for MC
if 7 is B then GG another mark gone :/




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[chrisdelinet]

If 7 is C then i lost 2 marks for MC
if 7 is B then GG another mark gone :/




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problem is it all rides on this one and another answer (depending if they can read my writing) that will determine if i get 97-98 or 98-99, hopefully 7 is b and im in a real chance to get state rank

 

[photastic]

well if you were to draw the graph you'll plug in pi/2, you get an undefined y value. therefore i presumed those straight line sections are in fact asymptotes. therefore thats why i put 2 solutions.... quite worried for this as it is one of the two marks that are ambiguous with me.

The picture clearly shows 3 x intercepts, between 0 and 2pie, hence 3 solutions.

 

[chrisdelinet]

for fuck sakes, i did not see that coming, that nails the bloody cover on the coffin, it must be 3...

i put 3 initially but then was like tanpi/2 is undefined, i freaking hate multiple choice now.

 

[photastic]

for fuck sakes, i did not see that coming, that nails the bloody cover on the coffin, it must be 3...

i put 3 initially but then was like tanpi/2 is undefined, i freaking hate multiple choice now.

No, there is a chance at pi/2 there is an open circle, hence B would be the answer in this case.