π/2

来源：学生作业帮助网编辑：作业帮时间：2024/05/02 09:52:00

π/2
π/2

π/2
因为π/2

原式等价于tana-1/tana=-8/3
移项整理得3(tana)2+8tana-3=0
由a的范围知tana<0
所以tana=-3

2kπ+π π/2 π/2 -π/2 π/2 -π/2 -π/2 π/2 π/2 π/2 π/2 2/π π/2 kπ-2π/3 已知π+2Kπ Sin(π+π/6)Sin(2π+π/6)Sin(3π+π/6).Sin(2008π+π/6)求值设2kπ+π/2 为什么=2Kπ+π/2