设角α,β满足-π/2<α<β<π/2,则α-β的取值范围

问题描述:

设角α,β满足-π/2<α<β<π/2,则α-β的取值范围

-π/2为什么-π/2<-β<π/2-π/2-β>-π/2所以-π/2