Jan11
时间:2021/01/11 09:24 | 分类:
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![csc、cot、sec与sin、cos、tan有啥关系? csc、cot、sec与sin、cos、tan有啥关系?](//www.lishixinzhi.com/dd/zb_users/cache/xinzhi/n/NDExOTkz.jpg)
csc、cot、sec与sin、cos、tan有啥关系? sin _ cos \/ tan _ 1 _ cot \/\/ sec csc 对角线:sinθ = 1/cscθ ,cscθ = 1/sinθ cosθ = 1/secθ ,secθ = 1/cosθ tanθ = 1/cotθ ,cotθ = 1/tanθ 三角形:sin2θ + cos2θ = 1 tan2θ + 1 = sec2θ cot2θ + 1 = csc2θ 顺时钟:tanθ = sinθ/cosθ ,sinθ = cosθ/cotθ ,cosθ = cotθ/cscθ cotθ = cscθ/secθ ,cscθ = secθ/tanθ ,secθ = tanθ/sinθ 逆时钟:tanθ = secθ/cscθ ,secθ = cscθ/cotθ ,cscθ = cotθ/cosθ cotθ = cosθ/sinθ ,cosθ = sinθ/tanθ ,sinθ = tanθ/secθ
它们是倒数的关系 1/sinx = cscx 1/cosx = secx 1/tanx = cotx
参考: myself
csc α =1/sin α cot α =1/tan α sec α=1/cos α 1+cot^2 α=sec^2 α 1+tan^2 α=csc^2 α cot α=sec α /csc α tan α=sin α /cos α
参考: ME