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Thread: solve the equation

  1. April 13th 2012, 03:29 AM #1
    bobmarly12345
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    solve the equation

    4sin(x-20degrees)=5cosx
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  2. April 13th 2012, 03:40 AM #2
    biffboy
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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. April 13th 2012, 05:18 AM #3
    bobmarly12345
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    Re: solve the equation

    brilliant thank you
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« simplify the following logarithms to a single log term | given that vector v1=2i-3j & v2=i+5j find: »

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