lim(x趋向0)(1-cos2x)/xsinx怎么解?
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lim(x趋向0)(1-cos2x)/xsinx
=lim(x趋向0)[(1-1+2Sin^2(x)] /xsinx
=lim(x趋向0)2sin^2x/xsinx
=lim(x趋向0)2sinx/x
=2
=lim(x趋向0)[(1-1+2Sin^2(x)] /xsinx
=lim(x趋向0)2sin^2x/xsinx
=lim(x趋向0)2sinx/x
=2
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2011-11-24
展开全部
lim(x趋向0)(1-cos2x)/(xsinx)
=lim(x趋向0)(2sin^2x)/(xsinx)
=lim(x趋向0)2sinx)/x
=2
=lim(x趋向0)(2sin^2x)/(xsinx)
=lim(x趋向0)2sinx)/x
=2
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