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Math Help - sketch sin graph

  1. #1
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    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:

    sketch sin graph-like-.jpg

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

    thanks!
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  2. #2
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    pickslides's Avatar
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    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.
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  3. #3
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    e^(i*pi)'s Avatar
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    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)
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  4. #4
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    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?
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  5. #5
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    e^(i*pi)'s Avatar
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    Yes - like on this pic (yes I know it says cos(x) but it's the same graph)

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