cos(-315°),tan8π/3等于多少

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cos(-315°),tan8π/3等于多少cos(-315°),tan8π/3等于多少cos(-315°),tan8π/3等于多少cos(-315°)=cos45°=2分之根号2tan8π/3=ta

cos(-315°),tan8π/3等于多少
cos(-315°),tan8π/3等于多少

cos(-315°),tan8π/3等于多少
cos(-315°)=cos45°=2分之根号2
tan8π/3=tan120 =负根号3

cos(-315)=cos(360-315)=cos45=0.707
tan8π/3=tan120=-tan60=-1.732