limx趋近于派sin3x比上tan5x的极限
问题描述:
limx趋近于派sin3x比上tan5x的极限
答
原式=limx→π sin3x*cos5x/sin5x
=limx→π (sin3x/sin5x)*cos5π
=limx→π (3cos3x/5cos5x)*(-1)
=-3cos3π/5cos5π
=-3/5.