α=0 rad sinα=0, cosα=1, tαnα=0, cotα不存在,secα=1, cscα不存在
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
还有几个算题常用的:
sin37°=3/5
cos37°=4/5
tan37°=3/4
sin53°=4/5
cos53°=3/5
tan37°=4/3
不知道你是高中生还是初中生,π=180°,如果不习惯看弧度制的话,自己换一下吧,希望能帮到你:)
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