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    when do i know when to do inverse for trig?
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    when you have an angle and the length of one side
    https://www.youtube.com/watch?v=PIWJo5uK3Fo
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    When you're trying to find the angle rather than the length


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    normal SOH CAH TOA is when you have an angle and a side, and you want to find out another side.
    The inverse is used when you have two sides and want to find out an angle

    eg:
    sin(x) = 1/2
    you can't type in 0.5/sin into your calculator, so to get x by itself, you have to do the inverse of sin:
    x= sin-1(1/2)
    x = 30
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    (Original post by surina16)
    normal SOH CAH TOA is when you have an angle and a side, and you want to find out another side.
    The inverse is used when you have two sides and want to find out an angle
    thanks
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    (Original post by Divinchi)
    thanks
    I edited in an example to help you understand
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    You use inverse trig functions when you have for example, sinx= .. Cosx=... Tanx=...
    You're trying to find the angle, x, such that sinx= some value.
    For example if sinx=0.5 then  x=\sin^{-1} x .
    You may see  \sin^{-1} x written as  \arcsin x .
 
 
 
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