1 Topic by torx11 (edited by torx11 2010-04-16 00:50:07)

Topic: Graph gives wrong graph for sine function

I am trying to graph f(t) = 900sin(pi/2(t - 1.5))+2100 over a period of 0 (min) and 4 (max) value of the x-axis. Min 1000 and max 3000 values of the y-axis. However graph gives me a wrong graph for this function. Here is an image,
http://i40.tinypic.com/ngsutl.jpg



On my ti-83 calculator it gives a totally different graph that. The correct graph for this should look like an inverted cosine graph that is moved up 2100 units vertically and shifted to the left 1.5 units. But what the graph program spits out is just crazy zig zag lines all over the place. Is this a bug of some sort or is there a setting I should change? Thank you for your help.

Re: Graph gives wrong graph for sine function

You probably meant to plot this function instead:

f(x) = 900sin(pi/2*(x - 1.5))+2100

Re: Graph gives wrong graph for sine function

Thank you that was it.