sin(540-α)/tan(α-180)*cot(-α-360)/tan(900-α)*cos(720-α)/sin(-α-360)

sinα>tanα sin(540-α)/tan(α-180)*cot(-α-360)/tan(900-α)*cos(720-α)/sin(-α-360) sin(540-α)/tan(α-180)*cot(-α-360)/tan(900-α)*cos(720-α)/sin(-α-360) 化简：sin^(-α)-tan(360-α)tan(-α)-sin(180-α)cos(360-α)tan(180+α) 若sinαtanα 若sinα*tanα 证明三角恒等式tanαsinα/(tanα-sinα)=(tanα+sinα)/tanαsinα 证明:(tanα*sinα)/(tanα-sinα)=(tanα+sinα)/(tanα*sinα) 证明:(tanα*sinα)/(tanα-sinα)=(tanα+sinα)/(tanα*sinα) 求证(tanα·sinα)/(tanα-sinα)=(tanα+sinα)/(tanα·sinα) 求证(tanαsinα)/(tanα-sinα)=(tanα+sinα)/(tanαsinα) 求证:(tanα+tanβ)/(tanα-tanβ)=sin(α+β)/sin(α-β) .[1/cos(-α)+cos(180°+ α )]/[1/sin(540°-α)+sin(360°-α)]=tan^3α 若a属于(0,π/2)试比较tanα、tan(tanα)、tan(sinα) 化简：tanα(cosα-sinα)+sinα(sinα+tanα)/1+cosα. 证明恒等式tanαsinα/tanα-sinα=1+cosα/sinα 求证：tan α=(sin α)/(sin α)求证：tan α=(sin α)/(cos α) cosα·tanα-Sinα