求解高数极限第七题
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原式=lim(x->π/2)[(sinx)^tanx]
=lim(x->π/2){e^[tanx*ln(sinx)]}
=e^{lim(x->π/2)[tanx*ln(sinx)]}
=e^{lim(x->π/2)[ln(sinx)/cotx]}
=e^[lim(x->π/2)(-cotx/csc²x)]
=e^[lim(x->π/2)(-sinx*cosx)]
=e^0
=1
=lim(x->π/2){e^[tanx*ln(sinx)]}
=e^{lim(x->π/2)[tanx*ln(sinx)]}
=e^{lim(x->π/2)[ln(sinx)/cotx]}
=e^[lim(x->π/2)(-cotx/csc²x)]
=e^[lim(x->π/2)(-sinx*cosx)]
=e^0
=1
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