你好!原式=2sin^2(3/4π)+tan^2(5/4π)*cot(-1/4π) =2sin^2(3/4π)+tan^2(5/4π)*cot(-1/4π) =2*(1/2)+tan^2(1/4π)*cot(-1/4π) =1+1*(-1) =1-1 =0 希望我的回答对您有所帮助!
很不错哦,你可以试下
sév█厂y饯ⅵgz阀z阀nséiΒfひ76104477642011-9-11 11:49:46
你好!原式=2sin^2(3/4π)+tan^2(5/4π)*cot(-1/4π) =2sin^2(3/4π)+tan^2(5/4π)*cot(-1/4π) =2*(1/2)+tan^2(1/4π)*cot(-1/4π) =1+1*(-1) =1-1 =0 希望我的回答对您有所帮助!
很不错哦,你可以试下
sév█厂y饯ⅵgz阀z阀nséiΒfひ76104477642011-9-11 11:49:46