数学加急请你来答已知点A(cos
解：k=(sin66`-sin6`)/(cos66`-cos6`)
=[sin(60`+6`)-sin6`]/[cos(60`+6`)-cos6`]
=(sin60`cos6`+cos60`sin6`-sin6` )/(cos60`cos6`-sin60`sin6`-cos6`)
=(根号3*cos6`+1/2sin6`-sin6`)/(1/2cos6`-根号3*sin6`-cos6`)
=(根号3*cos6`-1/2sin6`)/(-根号3*sin6`-1/2cos6`)
=(sin60`cos6`-cos60`sin6`)/(-sin60`sin6`- cos60`cos6`)
=(c...全部
解：k=(sin66`-sin6`)/(cos66`-cos6`)
=[sin(60`+6`)-sin6`]/[cos(60`+6`)-cos6`]
=(sin60`cos6`+cos60`sin6`-sin6` )/(cos60`cos6`-sin60`sin6`-cos6`)
=(根号3*cos6`+1/2sin6`-sin6`)/(1/2cos6`-根号3*sin6`-cos6`)
=(根号3*cos6`-1/2sin6`)/(-根号3*sin6`-1/2cos6`)
=(sin60`cos6`-cos60`sin6`)/(-sin60`sin6`- cos60`cos6`)
=(cos60`sin6`-sin60`cos6`)/(cos60`cos6`+sin60`sin6`)
=-sin54`/cos54`=-tan54` 所以 倾斜角为 -arctan54`。
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