[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fTXmzRt_RI98tg3GTrUlK1BaIvbpBM-1LAU5nmS4ZJnI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2023-10-16 08:07:54",100046788,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F779963ee1d4208bf525de459c2c9a807.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5d61445c0cadd03a5984e7c18c4db734.png\">","3","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F361b664af38b27956545458648205f4b.png\">",{"courseId":13,"courseImg":14,"courseName":15},"ae92f49bc3d23cb23902a948a8b4dc24","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fad190729952741de5b17b1ed210da488.png","高等数学","(三角函数基础017)在△ABC中,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa08b02b952ba15ddda75962ad585b800.png\">,BC=2,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F016777480888c1233ad72ee222cadc44.png\">,则边AC的长是( )",[18,29,39,48,57,67,77,86,89,97],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],100046772,[22,23,24,25],"45°","30°","15°","60°","(三角函数基础076)已知2sinα﹣3tan30°=0,则锐角α为( )","v1",0,{"answer":30,"createTime":31,"id":32,"options":33,"question":38,"source":27,"type":28},[],"2023-10-15 20:13:20",100046775,[34,35,36,37],"20","12\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","16","8\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","(三角函数基础057)如图,在菱形ABCD中,∠ABC=120°,对角线AC=4\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">,则菱形ABCD的周长为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9ea599bcded14c242919686c93542d8f.png\">",{"answer":40,"createTime":31,"id":41,"options":42,"question":47,"source":27,"type":28},[],100046777,[43,44,45,46],"2","-1","-2","1","(三角函数基础001)tan45°的值为( )",{"answer":49,"createTime":31,"id":50,"options":51,"question":56,"source":27,"type":28},[],100046779,[52,53,54,55],"8.1","7.5","6.4","9.2","(三角函数基础071)如图,在△ABC中,AB=AC=10,点D是边BC上一动点(不与B、C重合),∠ADE=∠B=α,DE交AC于点E,且cosα=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb5b4c26fc923f2811714b0636d5a52a2.png\">,则线段CE的最大值为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6f97810d515b05b17a93590f98922f8f.png\">",{"answer":58,"createTime":59,"id":60,"options":61,"question":66,"source":27,"type":28},[],"2023-10-15 20:49:43",100046781,[62,63,64,65],"5\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","20-\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","10-\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","2\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc8076653438d0ed96b356a393b75dae7.png\">","(三角函数基础068)如图,在Rt△ABC中,∠C=90°,sinA=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffe586745dbe4ad22caaa820fb7677948.png\">,AB=10,D是AC的中点,则BD的长度为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5e5170b3ad0b0525d02e1010dc8208b5.png\">",{"answer":68,"createTime":69,"id":70,"options":71,"question":76,"source":27,"type":28},[],"2023-10-15 20:49:42",100046784,[72,73,74,75],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb9febc74c112d3724a163c7b9b968758.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fed09b1093c49da4bc23ee4f044273bad.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffe586745dbe4ad22caaa820fb7677948.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb5b4c26fc923f2811714b0636d5a52a2.png\">","(三角函数基础009)如图,AB是斜靠在墙上的长梯,AB与地面夹角为α,当梯顶A下滑1m到A′时,梯脚B滑到B′,A'B'与地面的夹角为β,若tanα=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F779963ee1d4208bf525de459c2c9a807.png\">,BB'=1m,则cosβ=( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcf2f2505d7620a01cc951d9f7228252f.png\">",{"answer":78,"createTime":31,"id":79,"options":80,"question":85,"source":27,"type":28},[],100046786,[81,82,83,84],"4m","4\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">m","2\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">m","2m","(三角函数基础051)如图所示,某建筑物楼顶有信号塔EF,卓玛同学为了探究信号塔\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0ea6ee47cd9ecc5d3fe58179e8f3622f.png\">的高度,从建筑物一层A点沿直线AD出发,到达C点时刚好能看到信号塔的最高点F,测得仰角∠ACF=60°,AC长7米.接着卓玛再从C点出发,继续沿AD方向走了8米后到达B点,此时刚好能看到信号塔的最低点E,测得仰角∠B=30°.(不计卓玛同学的身高)则信号塔EF的高度为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6013314ec9de17da3004652db0d4d424.png\">",{"answer":87,"createTime":5,"id":6,"options":88,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":90,"createTime":31,"id":91,"options":92,"question":96,"source":27,"type":28},[],100046790,[93,94,46,95],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbc3086157932f16504cbe340dff620ed.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc3be6af53f947ffc2c3c858f479ce0ad.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F054b12d1c34151467e3cab42acaf56af.png\">","(三角函数基础016)如图,小正方形的边长均为1, \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc0494cb36ab1b5da4a3e872266dc18e2.png\"> A、B、C分别是小正方形的三个顶点,则sin∠BAC的值为( )",{"answer":98,"createTime":59,"id":99,"options":100,"question":104,"source":27,"type":28},[],100046792,[35,101,102,103],"2\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","6\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","(三角函数基础041)在△ABC中,AB=8,BC=6,∠B为锐角且\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F46ba9340873e36fed4c4e81bcdd271d1.png\">,则△ABC的面积为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8f0c08bfa3788778c00e57c28ab510c1.png\">"]