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Finding the solution

  1. Mar 9, 2007 #1
    This problem seems really easy but I don't know how to solve it. Can someone please help me?

    Give the solution in radians which is in the second quadrant for the equation
    4 sin(x) = 1.8
  2. jcsd
  3. Mar 10, 2007 #2

    Gib Z

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    Homework Helper

    [tex]4\sin x =1.8[/tex]

    [tex]\sin x = \frac{9}{20}[/tex]

    [tex]x = \arcsin(\frac{9}{20})[/tex]

    That answer will give you the solution in the first quadrant.

    Use the fact [tex]\sin (\pi - x) = \sin x[/tex] to finish off.
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