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Math Help - Solutions to sin equation

  1. #1
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    Solutions to sin equation

    Find all solutions to sin(x) = -13/40 in the interval [12pi, 16pi]. Answers to 2 decimal places!
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  2. #2
    Member
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    Jan 2009
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    Multiply out 12pi and 16pi and find their decimal approximations. This is the interval you are aiming for.

    Now, ask your calculator what the inverse sin of -13/40 is. Keep adding 2pi to it until you find every value that is in the range you found above.
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