∵tan(5π/3-α)=-5
∴tan(2π-π/3-α)=-5
tan(-π/3-α)=-5
-tan(π/3+α)=-5
∴tan(π/3+α)= 5
若tan(5π/3-α)=-5,則tan(π/3+α)的值是
若tan(5π/3-α)=-5,則tan(π/3+α)的值是
數(shù)學(xué)人氣:124 ℃時(shí)間:2020-06-04 06:44:48
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