求值sin10π/3-根号2cos(-19π/4)+tan(13π/3)
求值tan(kπ+π/6)cos(kπ-4π/3),k属于z
化简求值,sin(2a-π)tan(π+a)cota/cos(π-a)tan(3π-a)
求值sin25π/6+cos25π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-
一 求值tan(55+α)*tan(35+α)-cos^2(π/3-α)-cos^2(π/6+α)二 如图由已知怎么得到
已知tan(3π+α)=根号三,α∈﹙0,π/2﹚求值
1.已知tan2分之α=2,求值:⑴ tan(α+4分之π);⑵ (6sinα+cosα)/(3sinα-2cosα)
【跪求】【求值】(sin50(1+根号(3)*tan10)-cos20)\(根号(2)*cos80*sin10)
求值:sin(π/4)cos(19π/6)tan(21π/4)急!
求值:1/sin10°-根号3/sin80°
已知tan(π+α)=根号3tan(π/2-β),cos(3π/2+α)=-根号2cos(π+β),a∈(-π/2,π/
化简求值 tan70°cos10°+根号3sin10°tan70°-2cos40°
求值cos10°/tan20°+根号3sin10°tan70°-2cos40°