特殊三角函数,几个特殊角的值
问题描述:
特殊三角函数,几个特殊角的值
答
α=0 rad sinα=0,cosα=1,tαnα=0,cotα不存在,secα=1,cscα不存在 α=π/12 rad sinα=(√6-√2)/4 cosα=(√6+√2)/4 tαnα=2-√3 cotα=2+√3 secα=√6-√2 cscα=√6+√2 α=π/6 rad sinα=1/2,cosα=√3/2,tαnα=√3/3,cotα=√3,secα=2√3/3,cscα=2 α=π/4 rad sinα=√2/2,cosα=√2/2,tαnα=1,cotα=1,secα=√2,cscα=√2 α=π/3 rad sinα=√3/2,cosα=1/2,tαnα=√3,cotα=√3/3,secα=2,cscα=2√3/3 α=π/2 rad sinα=1,cosα=0,tαnα不存在,cotα=0,secα不存在,cscα=1 α=2π/3 rad sinα=√3/2,cosα=-1/2,tαnα=-√3 α=3π/4 rad sinα=√2/2,cosα=-√2/2,tαnα=-1 α=5π/6 rad sinα=1/2,cosα=-√3/2,tαnα=-√3/3 α=π rad sinα=0,cosα=-1,tαnα=0 α=3π/2 rad sinα=-1,cosα=0,tαnα不存在 α=2π rad sinα=0,cosα=1,tαnα=0