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解析 【解析】B根据分析:sinA=(BC)/(AB) cosB=(BC)/(AB) tanA=(BC)/(AC) tanB=(AC)/(BC) cosA=(AC)/(AB)所以旋转C.故答案为:c 结果一 题目 10.在Rt△ABC中,∠C=90°,下列关系式正确的是A. tanA = tanBB. tanA⋅cotB=1C.sinA=cosBD. cosA=cosB 答案 10.C相关推荐 110.在Rt△ABC...
已知∠A,∠B均为锐角,且∠A>∠B,则下列结论正确的是( )A. tanA<tanBB. tanA>tanBC. tanA=tanBD. 不能确定
在△ABC中,已知,则下列说法正确的是( ). A. tanA=tanB B. C. D. 相关知识点: 试题来源: 解析 BD 【分析】 由结合三角函数恒等变换公式及A+B+C=π化简可求出,然后逐个分析判断即可 【详解】 解:由A+B+C=π可得 则,即,则, 由可得, 则,, A选项错误;B选项.正确; C选项,,C错误; ,D正确;...
分析:利用两角和的正切函数公式表示出tan(A+B),根据A与B的范围以及tanAtanB>1,得到tanA和tanB都大于0,即可得到A与B都为锐角,然后判断出tan(A+B)小于0,得到A+B为钝角即C为锐角,所以得到此三角形为锐角三角形.解答:因为A和B都为三角形中的内角,
在Rt△ABC中,∠C=90°,则下列式子定成立的是x 3 A. sinA=sinBB. cosA=cosBC. tanA=tanBD. sinA=cosB 相关知识点: 试题来源: 解析 D【分析】根据三角函数的定义就可以解决.【详解】解:设Rt△ABC的两直角边分别为a、b(其中a为∠A的对边),斜边为c,则sinA=a/c,cosB=a/c,tanA=a/b,tanB=b/a...
在Rt△ABC中,∠C=90°,下列关系式正确的是( ) A.tanA=tanBB.tanA×cotB=1 C.sinA=cosBD.cosA=cosB 答案 根据分析:B AsinA= BCABcosB= BCAB.tanA= BCACtanB= ACBCcosA= ACAB所以旋转C.故答案为:c相关推荐 1在Rt△ABC中,∠C=90°,下列关系式正确的是( ) A.tanA=tanBB.tanA×cotB=1 C.sin...
vadimostanin / simdjson vaimalaviya1233 / simdjson Validark / simdjson varchar-io / simdjson vbirds / simdjson vbmithr / simdjson vdt / simdjson velveteer / simdjson Venseer / simdjson vgatherps / simdjson vic4key / simdjson vinay / simdjson VinayaSathyanarayana /...
The most common genotype was AB (39.5%) followed by AA (19.5%), AD (12.7%), and BB (11.7%). Homozygous D'D', GG, and NN individuals were not found. Further analysis will be performed in order to establish associations among genotypes and quantitative and qualitative milk traits....
The most common genotype was AB (39.5%) followed by AA (19.5%), AD (12.7%), and BB (11.7%). Homozygous D’D’, GG, and NN individuals were not found. Further analysis will be performed in order to establish associations among genotypes and quantitative and qualitative milk traits....