lim((x→0)(1-cos2x)/(x*sinx)
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lim((x→0)(1-cos2x)/(x*sinx)lim((x→0)(1-cos2x)/(x*sinx)lim((x→0)(1-cos2x)/(x*sinx)lim((x→0)(1-cos2x)/
lim((x→0)(1-cos2x)/(x*sinx)
lim((x→0)(1-cos2x)/(x*sinx)
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