# Math Help - sketch sin graph

1. ## sketch 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:

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

thanks!

2. 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.

3. 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 $y = \cos(x)$

4. 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?

5. Yes - like on this pic (yes I know it says cos(x) but it's the same graph)