hi, i nned to put these into a sin graph:

Y=sinx

Y=sin(x+90)

Y=3sinx

i can to the first and third ones but not the second, would it look like this:

Attachment 20879

if this is incorrect can someone please tell me how to improve.

thanks!

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- Feb 20th 2011, 11:07 AMandyboy179sketch sin graph
hi, i nned to put these into a sin graph:

Y=sinx

Y=sin(x+90)

Y=3sinx

i can to the first and third ones but not the second, would it look like this:

Attachment 20879

if this is incorrect can someone please tell me how to improve.

thanks! - Feb 20th 2011, 12:19 PMpickslides
You have the general idea with the intercepts and turning points correct for one cycle.

I know the software used tricky to master but you must understand the function is a smooth curve. I would use technology to see this. - Feb 20th 2011, 12:27 PMe^(i*pi)
Apart from the fact it should be a curve the graph (intercepts, maxima etc) are fine.

You may notice that the graph is the same as $\displaystyle y = \cos(x)$ - Feb 20th 2011, 12:30 PMandyboy179
I know it has to be a curve but I haven't got the software for this so I have to use 'paint'. So what I have posted is correct apart from when I actually do it on paper I draw curves?

- Feb 20th 2011, 12:34 PMe^(i*pi)
Yes - like on this pic (yes I know it says cos(x) but it's the same graph)

http://content.tutorvista.com/maths/...ges/img670.gif