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Math Help - Find the limit as f(x) approaches 0

  1. #1
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    Find the limit as f(x) approaches 0

    lim as x --> 0

     [sin^2 (2x)]/x^2
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  2. #2
    Member roshanhero's Avatar
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    Use L'hospital rule
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  3. #3
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    Quote Originally Posted by roshanhero View Post
    Use L'hospital rule
    i know the answer is 4 but i don't know how to get there...or how to use that rule
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  4. #4
    Member roshanhero's Avatar
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    Can u differentiate sin^2(x) and x^2
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  5. #5
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    Quote Originally Posted by roshanhero View Post
    Can u differentiate sin^2(x) and x^2
    actually no i get it now.

    i have to multiply top and bottom by 2. that results in a special limit for sin.

    (2sin2x/2x)^2
    =(2)^2
    =4
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  6. #6
    Member roshanhero's Avatar
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    yeap.............
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