limx→0(1-cosx√cos2x√cos3x)/x²
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limx→0(1-cosx√cos2x√cos3x)/(e^x+1)sinxdxlimx→0(1-cosx√cos2x√cos3x)/(e^x+1)sinxdxlimx→0(1-cosx√cos2x√
cos3x+2cosx=0.sinxtanx/2=1.sinx-cosx=san2x-cos2xcos3x+2cosx=0.sinxtanx/2=1.sinx-cosx=san2x-cos2xcos3
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