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October 7th, 2009, 05:58 PM   #1
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Graphing Trig Equations

I'm having a really hard time graphing a trig equation. I want to check my solutions for variable x, but since the equation is missing y I don't know how to set it up on my graphing calculator. If someone could help me on this, it will be of tremendous help.

Ex:
sin(3x)=(-1)
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October 7th, 2009, 06:25 PM   #2
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Re: Graphing Trig Equations

Assuming you want the values of x where sin(3x) = -1, use y = sin(3x) + 1 and then find the zeroes.
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October 7th, 2009, 06:29 PM   #3
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Re: Graphing Trig Equations

ok, just set y=sin(3x)+1 and plot it over say y and x each over -4 to +4. You'll see the plot, but for your problem, y=0, so then you will be able to see the solutions where this is the case ...
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October 7th, 2009, 06:59 PM   #4
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Re: Graphing Trig Equations

Thank you guys! I really appreciate it.
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