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Former Member
Posts: 1,876,323 The Mix Honorary Guru
Ok, for those people among you who are vaguely geekish when it comes to maths - I'm kinda in need of some help.
With exact values for sine, cosine and tan i have issues. I can understand the ones that are within the four quadrants, but I get stuck when it comes to 90, 180, 270 and 360 degrees. How dyou know whether they are positive or negative? And how do you know if they are 1 or 0?
I know that for 90 degrees, sin = 1 and cos = 0, and tan is undefined. But how do you work out the other ones?
*is confused*
With exact values for sine, cosine and tan i have issues. I can understand the ones that are within the four quadrants, but I get stuck when it comes to 90, 180, 270 and 360 degrees. How dyou know whether they are positive or negative? And how do you know if they are 1 or 0?
I know that for 90 degrees, sin = 1 and cos = 0, and tan is undefined. But how do you work out the other ones?
*is confused*
Post edited by JustV on
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Ooo, that's rather a good idea...
Gotta love my graphics calculator that draws ace graphs
lucky you having a calculator to do the graphs for you when I was at school I had to draw them all out by hand!
Wahoo! :crazyeyes