Sketching trig functions (1 Viewer)

[gronkboyslim]

i have a mathomat (those mats with shapes and stuff) and on it there are sine and cos graphs, but the pi are like 1 cm and 2 cm apart.

my teacher said it should around 3 cm apart which i know is true

is it still okay to use these curves using normal 1cm grids

or do i have to change the units in the x axis?

 

[kini mini]

I would just do it freehand. It's not that hard with a bit of practice. The scale will usually be something weird if asked in an exam, remember to make it pretty big and clear and you'll be ok.

 

[flyin']

just to add to that in the hsc if you do do sketching it will be on normal lined paper (well, it'll be around a cm per line spacing) ... and clear half-page sketches are preferable ...

 

[spice girl]

i've lived thru high school without a stencil...so it's a luxury item if you've got one but it's not necessary, it's better to learn to live without one...

 

[ezzy85]

Originally posted by spice girl
i've lived thru high school without a stencil...so it's a luxury item if you've got one but it's not necessary, it's better to learn to live without one...

heh, i didnt even know they existed. what is it, it makes curves for you?

 

[gronkboyslim]

its just a template so you can trace circles, curves and stuff

you can get flexi curves too which are pretty neat

my teacher hates free hand stuff, he said its not accurate

 

[kini mini]

Originally posted by gronkboyslim
its just a template so you can trace circles, curves and stuff

you can get flexi curves too which are pretty neat

my teacher hates free hand stuff, he said its not accurate

I got a flexi curve...for chemisty graphs .

Like spice girl, I managed somehow to survive high school without a template. I even draw my circles freehand, they're not bad either if I say so myself.

As for accuracy, I think your teacher is fussing a little - how can you possibly be *that* accurate with the equipment at hand? Does he want 3 significant figures?? Obviously you'll have to humour him but as Pri said, in the HSC all you need is a clear half page diagram. Most people I know just use a ruler for the scale and do the rest freehand. The person who topped 4U from my school was one of these.