Well, it's the same as graphing any other line. Just go to y1 and then type in the expression. However, what may be confusing is that you have to be in radian mode to see the curve. If you're in degree mode all you will see is probably a weird graph which doesnt come close to representing a curve. To change to radian mode, you press mode and then then switch from degrees to radian.
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input as this:
Y1 = (9)Cos((2x + (π/2))
Y3 =
Y4 =
Y5 =
Y6 =
and see person above me on how to switch to radians.
Mode -> switch degree to radian
Well, it's the same as graphing any other line. Just go to y1 and then type in the expression. However, what may be confusing is that you have to be in radian mode to see the curve. If you're in degree mode all you will see is probably a weird graph which doesnt come close to representing a curve. To change to radian mode, you press mode and then then switch from degrees to radian.