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Math Help - Negative in the CAST Diagram

  1. #1
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    Negative in the CAST Diagram

    Hi again,

    If -sinx=0, where would it be on the CAST diagram? Would it be in the bottom quadrants (so 180, 270?)

    Also, if it's \frac{2}{3} for sin, would it be the top quadrants?

    Thanks
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  2. #2
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    Quote Originally Posted by watp View Post

    If -sinx=0, where would it be on the CAST diagram? Would it be in the bottom quadrants (so 180, 270?)



    Thanks

    In the unit circle -\sin x  = 0 between quadrants, it has the same solution to \sin x  = 0 , draw both functions on the same set of axes, you will see!


    Quote Originally Posted by watp View Post

    Also, if it's \frac{2}{3} for sin, would it be the top quadrants?

    Thanks
    Correct, for \sin x  = \frac{2}{3},  x\in (0,\pi)

    Yep.
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