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Math Help - Sketch the graph of y=3sin2x+1

  1. #1
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    Sketch the graph of y=3sin2x+1

    Sketch the graph of y=3sin2x+1 for 0<x<\frac{3}{2}\pi

    then,using the same axes,sketch the suitable straight line to find the number of solutions for the equation {3\pi}sin2x=2x for 0<x<\frac{3}{2}\pi.State the number of solutions..
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  2. #2
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    Quote Originally Posted by mastermin346 View Post
    Sketch the graph of y=3sin2x+1 for 0<x<\frac{3}{2}\pi

    then,using the same axes,sketch the suitable straight line to find the number of solutions for the equation {3\pi}sin2x=2x for 0<x<\frac{3}{2}\pi.State the number of solutions..
    Note the obvious first, the amplitude is 3. The graph has a period of 2pi/2=pi rad and it stops at 3pi/2. Then, move the graph up by one unit.

    Draw y=2x+1 to obtain the number of solutions.
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