HELP bebz :) (1 Viewer)

[Dylanamali]

What is rectangular form?

E.g. Express 5cisπ in rectangular form.


Also, when it says express things in polar form is that just another word for mod-arg form?

AND, lastly.. when finding the argument, and not getting a nice number not an exact value for tan inverse, do you present the mod-arg form with the tan inverse or do you give a numerical approximation?


THANK YOU!

 

[SpiralFlex]

Rectangular form:







[HR][/HR]

Rectangular coordinates:

Rectangular form:

On your Casio Rec button.


[HR][/HR]

Polar form is polar bears.

Polar coordinates:

Polar form:

On your Casio Pol button.

[HR][/HR]

Why not exact tan value? It's more smexy.

 

[Carrotsticks]

Did you mean (-5,0) ?

Rectangular form is the co-ordinate system you know ie: (x,y,z) etc. Also known as the Cartesian co-ordinate system.

Polar form is what Spiral said (r, theta), which is actually a 2-Dimensional version of either the Cylindrical Co-ordinate system (where z=0) or the Spherical Co-ordinate system (where the azimuth, denoted by phi, is equal to pi/2)

Actually, I suppose the azimuth could be anything between 0 and pi provided we extend the radius rho a bit further and take the projection onto the (x,y) plane...

 

[SpiralFlex]

There goes my HSC.....

 

[Dylanamali]

tanks babeh!

ooh.. i never noticed those buttons on the calculator.. how do you use them.. when i input numbers of sin or cos i get maths errors.

 

[SpiralFlex]

Yes I made a mistake.

 

[Dylanamali]

so when the question asks for rectangular FORM.. is that just x + iy form?
so you don't give your answer as (-5,0) but rather -5 + 0i?

 

[SpiralFlex]

Use



It has nice curves.

 

[Dylanamali]

haha tanks bebz!

you some smexy, penguiny bebz right there.

 

[Carrotsticks]

Good to see Mathematics bonding two individuals together.

 

[SpiralFlex]

And before you know it we're going to have three little ones.

 

[mirakon]

Never heard the word smexy used before

I like it

 

[delian]

There goes my HSC.....

Dramatic much