Urgent - Can you write cis in the hsc (1 Viewer)

[swarley2345]

Can you write cis in the hsc? Thankyou!

 

[Robert21]

I think so - well I'm going to anyway

 

[smiley_riley]

Even if it's not "technically allowed", as long as it shows your working out to find the answer there should never be an issue. You could use a for your variables as long as it gets the right answer.

If you're really worried you could always write let z = cos(x) + isin(x) = cis(x)

 

[Trebla]

Tbh, I don’t see the point of using the short-hand ‘cis’ when the exponential form is just as convenient (and technically shorter)

 

[Sam14113]

Tbh, I don’t see the point of using the short-hand ‘cis’ when the exponential form is just as convenient (and technically shorter)

Agreed, unless it says to 'express your answer in modulus-argument form' or something

 

[scaryshark09]

bruh i use cis every single time...
will i be fine?

 

[Sam14113]

bruh i use cis every single time...
will i be fine?

Should be -- there's not gonna be any marker who doesn't know what cis means.

Just make sure it doesn't look too similar to cos (I tend to do that occasionally)

 

[carrotsss]

bruh i use cis every single time...
will i be fine?

Yeah you’re fine

 

[carrotsss]

Tbh, I don’t see the point of using the short-hand ‘cis’ when the exponential form is just as convenient (and technically shorter)

I tend to use exponential hut the only problem with it is it’s so small that I sometimes just lose numbers because of handwriting which isn’t really ideal

 

[Luukas.2]

Should be -- there's not gonna be any marker who doesn't know what cis means.

Just make sure it doesn't look too similar to cos (I tend to do that occasionally)

There are some markers who passionately hate cis... though that's more likely to be an issue in trials than in the HSC, where the markers will be required to conform to the same standards.

Making "cis" and "cos" clearly different is important, though.

I tend to use exponential hut the only problem with it is it’s so small that I sometimes just lose numbers because of handwriting which isn’t really ideal

This can be dealt with by writing rather than

 

[carrotsss]

There are some markers who passionately hate cis... though that's more likely to be an issue in trials than in the HSC, where the markers will be required to conform to the same standards.

Making "cis" and "cos" clearly different is important, though.



This can be dealt with by writing rather than

never knew that was a thing, cheers

 

[Trebla]

There are some markers who passionately hate cis... though that's more likely to be an issue in trials than in the HSC, where the markers will be required to conform to the same standards.

Making "cis" and "cos" clearly different is important, though.



This can be dealt with by writing rather than

That’s probably because ‘cis’ is not a standard or commonly used notation in mathematics. It is rarely seen outside the HSC. Everyone else just uses the exponential form (note that “exp( )” is standard notation) or the full mod-arg form. I don’t think I’ve ever seen ‘cis’ used in uni maths.

 

[Luukas.2]

That’s probably because ‘cis’ is not a standard or commonly used notation in mathematics. It is rarely seen outside the HSC. Everyone else just uses the exponential form (note that “exp( )” is standard notation) or the full mod-arg form. I don’t think I’ve ever seen ‘cis’ used in uni maths.

Yes, I don't use it.