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Thread: Rearranging Equation

  1. September 28th 2009, 01:18 AM #1
    BabyMilo
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    Rearranging Equation

    Solve and Find T,

    \frac{Tcos40}{8+Tsin40}=\frac{2}{5}

    T=6.29(3sf)

    Please show each step of working!

    Million thanks!
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  2. September 28th 2009, 01:44 AM #2
    Grandad
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    Hello BabyMilo
    Quote Originally Posted by BabyMilo View Post
    Solve and Find T,

    \frac{Tcos40}{8+Tsin40}=\frac{2}{5}

    T=6.29(3sf)

    Please show each step of working!

    Million thanks!
    \frac{T\cos40}{8+T\sin40}=\frac{2}{5}

    \Rightarrow 5T\cos40=2(8+T\sin40)

    =16+2T\sin40

    \Rightarrow 5T\cos40-2T\sin40 =16

    \Rightarrow T(5\cos40-2\sin40)=16

    \Rightarrow T = \frac{16}{5\cos40-2\sin40}

    =6.29 (3 s.f.)

    Grandad
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  3. September 28th 2009, 02:56 AM #3
    BabyMilo
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    you are a genius or is it im just stupid.
    thanks!
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  4. September 28th 2009, 04:13 AM #4
    Grandad
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    Probably neither!

    Grandad
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