为什么y=(2sina+2-3)/(sina+1)=2-3/(sina+1)
问题描述:
为什么y=(2sina+2-3)/(sina+1)=2-3/(sina+1)
答
呵呵,楼主,这个分数有点浪费了:
答:
y=(2sina+2-3)/(sina+1)
=[ 2(sina+1) -3 ]/(sina+1)
=2(sina+1)/(sina+1) - 3/(sina+1)
=2-3/(sina+1)