Carrotsticks' MX2 HSC 2013 Solutions (2 Viewers)

[Carrotsticks]

Bump. Is my solution valid?

You said that the arg was inverse tan ....

Are you sure this is always true?

 

[Makematics]

You said that the arg was inverse tan ....

Are you sure this is always true?

wait why isn't it? Sorry i've forgotten a lot over the past two months hahaha

 

[Carrotsticks]

Consider the arg of -1-root(3)i.

 

[Makematics]

Consider the arg of -1-root(3)i.

hmmm yeah I get what you mean, but how come the answer still comes out?

EDIT: But the question tells you the complex numbers are both in the first quadrant, right?

 

[Makematics]

bump

 

[anomalousdecay]

wait why isn't it? Sorry i've forgotten a lot over the past two months hahaha

Same here haha. I've forgotten stuff in Chem and Physics, but somehow math is ok.

Oh yeah and bump for the question of course.

 

[Makematics]

Oh yeah and bump for the question of course.

Thanks lol, im still curious as to why i lost two marks

 

[anomalousdecay]

Thanks lol, im still curious as to why i lost two marks

Maybe discuss it next week at the meet.

I still don't know how to do that question or mechonics lol.

 

[Trebla]

Same here haha. I've forgotten stuff in Chem and Physics, but somehow math is ok.

Oh yeah and bump for the question of course.

Think about the range of the inverse tan function

Maybe a scan of what was written might help?

 

[mreditor16]

the link is dead.

btw admitri I pm'ed you!

 

[QZP]

Why is file gone :{

 

[Carrotsticks]

the link is dead.

btw admitri I pm'ed you!

Why is file gone :{

I've updated it =)

Thanks for letting me know!

 

[mreditor16]

I've updated it =)

Thanks for letting me know!

thanks Carret.

 

[mreditor16]

Carret, I think there is a typo with Q16 b) v)....

Shouldn't your definition of b be such that b is the length of the semi-minor axis? You define it as the length of the minor axis, which should be 2b, no?

Tell me if I'm wrong

 

[mreditor16]

bumpity bump

 

[mreditor16]

Carret, I think there is a typo with Q16 b) v)....

Shouldn't your definition of b be such that b is the length of the semi-minor axis? You define it as the length of the minor axis, which should be 2b, no?

Tell me if I'm wrong

bumpity bump

 

[Carrotsticks]

Carret, I think there is a typo with Q16 b) v)....

Shouldn't your definition of b be such that b is the length of the semi-minor axis? You define it as the length of the minor axis, which should be 2b, no?

Tell me if I'm wrong

In which case, it should be "Semi-minor axis". Cheers =)

 

[mreditor16]

In which case, it should be "Semi-minor axis". Cheers =)

okay, thanks for confirming. I just wanted to check I wasn't doing something stupid. thanks!