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eqId64b9b599fdb6481e9f8d9a94c102300b中,eqId478e3bb0a3e14e759cbd7ab1ddf1811aeqId0bf67f29ce53456bb2caeebe3e04bd83,则角B的大小为(    )
A.eqId4023ceb292e24a45871ca56fa44d50e3B.eqIdd01b7918993a412cb774dea127f210b6C.eqIdf1c3337151994ec4b99354c9d54f311cD.eqIdcbf8f098b4634cf49e9e651e10b7cf1d
eqId64b9b599fdb6481e9f8d9a94c102300b中,角eqIdcc614bd3390c4d028df189b234dcc351eqId8754ce8cf7f34f04abb9a0c041f57f5ceqId19a4eb16029e4550a14f2afe4741a3c3所对的边分别为eqId70a27b6ddf6b478285353abb3b1f3741eqIdaea992e70d4943e49e893817eb885ed7eqIdad7cefefaba947e1a168bca491c4fca1,已知eqIdf4402b29e3c747ed94bb79cc8f97d914eqId79ef5d56f42d4437bc24a71cb84a9435eqId24228649a3fe40209b032d25e715b16d,则eqIddaa30df34f3343e9b90f0303e0d2a55a(   ).
A.eqId5222c2ea3b544c58bafb590c9238c493B.eqIdbe16cd0bb9774324a8d1694c43f41ac2C.eqId5222c2ea3b544c58bafb590c9238c493eqIdbe16cd0bb9774324a8d1694c43f41ac2D.eqId5222c2ea3b544c58bafb590c9238c493eqIdcef078289ba34abe959d0c8cf64dc4fb
eqId64b9b599fdb6481e9f8d9a94c102300b中,角eqIdcc614bd3390c4d028df189b234dcc351eqId8754ce8cf7f34f04abb9a0c041f57f5ceqId19a4eb16029e4550a14f2afe4741a3c3的对边分别为eqId70a27b6ddf6b478285353abb3b1f3741eqIdaea992e70d4943e49e893817eb885ed7eqIdad7cefefaba947e1a168bca491c4fca1.若eqIda08ce385279d41c789695fb651b17890eqIdb4c40d745e6b4d2f96de67cb8cc984abeqIdd062ea658db54345b025d12cde2ea32b,则eqIde6581f86694d4da4afaef4d6876ce375(   )
A.eqId37705e1ef6a84bbdbe88433e75932cdfB.eqId317ed84d205b4156847380f7e9f38b08C.eqId2644c4fd7d684e75ae5ed93cb3581244D.eqId7bcd573cee334383ad72cc4b179fcfb3
同步
在△ABC中,角eqIdb196052e7e8947219fba3dda3914d85c对边分别为eqIdef87d5f6cb6c4c25943f4ce30656b3a5.设向量eqIdf6325a5d99d3483b996dd842c734474feqIdbb427925c9f740d6ad3e1a5f2c87e0cfeqIdd345e388bad447bb82c6df1a89055979
(Ⅰ)若eqIda5dae5ac574347b29872b7ae918546cd ,求证:△ABC为等腰三角形;
(Ⅱ)已知c=2,eqIdca3cce1573f1498094b477fe82329d4a,若eqIda8db5bfc03eb425e97131b923e874f3c,求△ABC的面积S.
如图,在eqId64b9b599fdb6481e9f8d9a94c102300b中,已知eqId7ce37cc7f17e4371a312c892b47514b7eqId0cd8063abf2b458f80091bc51b75a904eqId0627be51821d4be7b3e024a354815d64边上的一点,eqId0a8d83b39696456b9359a46eb70afb36eqId22ba6b1c3e614aff8db1e2246eab3549eqId8756af76be5b4ee3a6fb9b2dc685d798
说明: figure
(1)求角eqId8754ce8cf7f34f04abb9a0c041f57f5c的大小;
(2)求eqIdc1606811a17a43ab89872b189e4eecc5的面积.
eqId64b9b599fdb6481e9f8d9a94c102300b中,若eqId16139ed8adff4bc9b3ef225b97a6f732eqIde1c7e625597141d18eadc3200aaa430feqIddad31040fd02475ea52d192682cf59c6,则eqId99a3187c2b8f4bcc9703c74c3b72f1f3等于(   )
A.eqIdc052ddfbd4524f67a79e0e77c2e5656aB.eqIda2a0ce3781fa4c26b624f5966b7dee44C.eqId7bcd573cee334383ad72cc4b179fcfb3D.eqId62f2412997424b4ca41272f35d432557
在△ABC中,tanA=2tanBAC=1,则△ABC的面积的最大值为____.
eqId64b9b599fdb6481e9f8d9a94c102300b中,角eqIdcc614bd3390c4d028df189b234dcc351eqId8754ce8cf7f34f04abb9a0c041f57f5ceqId19a4eb16029e4550a14f2afe4741a3c3的对边分别为eqId70a27b6ddf6b478285353abb3b1f3741eqIdaea992e70d4943e49e893817eb885ed7eqIdad7cefefaba947e1a168bca491c4fca1,则下列结论中正确的是(   )
A.若eqId142fb6f8712a4e04a73b56741b7207aa,则eqId30c12283e46b4115bb4475066d23eff0
B.若eqIdcbbe83c237994360a53759a309b76588,则eqId64b9b599fdb6481e9f8d9a94c102300b是等腰三角形
C.若eqId12d34ddd7f0345fc88ee7bc92683e8fb,则eqId64b9b599fdb6481e9f8d9a94c102300b是直角三角形
D.若eqId1fbf61e933314caf812479a05276dd06,则eqId64b9b599fdb6481e9f8d9a94c102300b是锐角三角形
已知锐角三角形eqId89fbdcb029be4482b52165366491c70f的内角eqIdcc614bd3390c4d028df189b234dcc351eqId8754ce8cf7f34f04abb9a0c041f57f5ceqId19a4eb16029e4550a14f2afe4741a3c3的对边分别为eqId0ce93bfa1f6a4a23b3258410dd19847a,其外接圆半径eqId7dcd2312d0bf4bb1befdfcc170e45791满足eqIdd1f0c826fbe94d4d8928f44736ec346c.
(1)求eqId8754ce8cf7f34f04abb9a0c041f57f5c的大小;
(2)已知eqIdb1803dcd0646465285ffbf361c487652的面积eqIdd80d5e35ae1a4ebb8a2770fc66fd70d0,求eqIde851c5bb48dd4145a6ba23666fbffd03的取值范围.