calculus

lim as x-> 0 of 3x/(sin2x)

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  2. lim as x-> 0 of 3x/(sin2x)

    3 * lim as x-> 0 of [ x/(sin2x) ]

    as x--0, sin 2x --> 2x - (2x)^3/3! etc which approaches 2x when x is small

    3 * x/(2x) = 3/2

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