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Math Help - Inv. Trig Function

  1. #1
    ADY
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    Inv. Trig Function

    If you want to find a value for X from which

    sin^-1(x) = 0.8

    I have graphed this, and is X = .916

    Any help please
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  2. #2
    Flow Master
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    Quote Originally Posted by ADY View Post
    If you want to find a value for X from which

    sin^-1(x) = 0.8

    I have graphed this, and is X = .916

    Any help please
    Your post makes no sense.

    If you want to solve \sin^{-1}x = 0.8 \Rightarrow x = \sin 0.8 then use a calculator. I get x = 0.717 (correct to 3 decimal places) assuming you're measuring angle in radians.

    Otherwise, please post the question exctaly as it appears in your book or wherever it is you got it from.
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  3. #3
    ADY
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    Apologises Mr F.

    I was just clearly mashing the keypad lol.

    Ok, so lets try again.

    Explain how i can use the inv. trig functions on my calc to find a value of X. From sin(X) = 0.8

    Thanks
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  4. #4
    Flow Master
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    Quote Originally Posted by ADY View Post
    Apologises Mr F.

    I was just clearly mashing the keypad lol.

    Ok, so lets try again.

    Explain how i can use the inv. trig functions on my calc to find a value of X. From sin(X) = 0.8

    Thanks
    \sin x = 0.8 \Rightarrow x = \sin^{-1} (0.8) = 0.927 radians.
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