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Math Help - solve the equation

  1. #1
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    solve the equation

    4sin(x-20degrees)=5cosx
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  2. #2
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    Re: solve the equation

    sin(x-20) = (5/4)cosx

    sinxcos20-cosxsin20=(5/4)cosx

    sinxcos20 = cosx(5/4+sin20)

    sinx/cosx = (5/4+sin20)/cos20 So tanx = (5/4+sin20)/cos20 x = 59.45
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  3. #3
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    Re: solve the equation

    brilliant thank you
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