Trig help needed here!

[mathfun]

First push graph then push trace. You should see x=? at the bottom of the screen. What does it say?

it says..
x=3.1415927
y=-4.1E-10

at the top it says
T1=sin(x

 

[Gene]

Pheew! That is the end of the quad II (=pi). Quad I ends half way to the left (=pi/2), quad III ends halfway to the right (=3pi/2) quad IV ends all the way to the right (=2pi). You are looking at four quads spread equally across the screen.
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Gene

 

[mathfun]

are u serious??

So for radian graphs it works like this??
or for trig graphs??

and rest of the time its like this:

 

[Gene]

That's it exactly. Points on the x axis are the number of radians (or degrees) between the axis separating quad I and quad IV and the radius of the unit circle. Pi/2 = 90°, pi=180°, etc. The y plot is the height of the function in the unit circle. If the function is sine it is the height oh the triangle.
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Gene

 

[mathfun]

wow...
THANKS SOOOO MUCH
i'm so sorry for confusing you just because i didn't know about this quadrant rule. Thanks thanks thanks. Now i will try and do my questions! thanks thanks thanks! sorry...for the confusion