tanα=-1 α=?tan α=根号3 α=?tan α=1/根号3 α=?

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tanα=-1α=?tanα=根号3α=?tanα=1/根号3α=?tanα=-1α=?tanα=根号3α=?tanα=1/根号3α=?tanα=-1α=?tanα=根号3α=?tanα=1/根号3α

tanα=-1 α=?tan α=根号3 α=?tan α=1/根号3 α=?
tanα=-1 α=?
tan α=根号3 α=?
tan α=1/根号3 α=?

tanα=-1 α=?tan α=根号3 α=?tan α=1/根号3 α=?
“tanα=根号3”是个很常用的值,α=60°……后一个α=30°.详细过程可以拿个计算器,用arctan这个按键做.