lim(1-cosax/sinx^2)(a为常数)的极限.x趋向于o.

问题描述:

lim(1-cosax/sinx^2)(a为常数)的极限.x趋向于o.

lim(1-cosax/sinx^2)=limasinax/2xcosx^2)=lima^2sinax/2axcosx^2)=a^2/2