△的公式
![求根公式求解的时候,一定判断△的值. 我们来看例题 例题1](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E9437FDE2AD5B86483118FF5339BEAE1090E56E1A26D4EDB55CB737DD4F6C94E437AF3060412A248D9257BD707C17B75E15EE550C86D40649FCC9311AF477D86FA25A010B07D851822AEF3207E04DDCC0A)
求根公式求解的时候,一定判断△的值. 我们来看例题 例题1
图片尺寸640x478![求根公式](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E9E5E4C8B58EEB7730330F4EEC380BB35C61B596F1D13D073D99DAED0A6E3BB5091A58C37E91C2407B6ED96AD042A33B66FEC82253E66896E7EBC9AEF48022263DAEB7B11B048A31384FD37A9BF0F298FC)
求根公式
图片尺寸344x290![一元二次方程](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A732F732D5BABCC31487A46343E310C2AD55CB71F020999447B700A3CBC8286FA215E5917F7AA2D5190DF40E12168DFB389D681DB819E9EBA3A7870410894237ABF554D71CE5B01684BB2816DA628961CDF)
一元二次方程
图片尺寸670x739![在△abc中,a=60,a=√3,b=√2,则△abc面积,在线等](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A73D17BD84650DB3613A0C6326A49A27D9C60D7BB7E86A3EB565B056AACF55B4ADBB05C9DE3E35E81EB15AB2245C8ED4C12101EEDD011EBF13C02F9F86769F463D6863173ED7828B4572C6DC9A619E7A9FF)
在△abc中,a=60,a=√3,b=√2,则△abc面积,在线等
图片尺寸780x1040![①△三角函数诱导公式99sin05x cos05x=1;99sin2x=2sinx](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E839F3ACA88D5FBC1E5F4EDF09ED68B8309CA5B4327160220C22D0FB4A04E137C2A4C8038FA8F34F007D76D210F1B009CCD9775E46098C6A99F48BA9906AC85DD1A1F2A0707F0C817B4EAA0D8968661C567)
①△三角函数诱导公式99sin05x cos05x=1;99sin2x=2sinx
图片尺寸664x768![求解三角形△,简单一点的](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A739A92331BB47C854544D8D2D6B0A5002F19F2E5401B349E8DBDC9F8EF38768A1A4252C7C8A887E23E0A8A61D4BEB3BDADF973ACB4487591DB75B6EE2B42BFEBD9BBF5B0D6D9E170F6F913CE507888E166)
求解三角形△,简单一点的
图片尺寸817x460![用△判别式判断一元二次方程根的三种情况](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E83449FE0B5E5081837160D4B35F1B0DB604802251DA0EF13CE77E98F285ADA8C562D7AE5A44FF7E97E5D717DCBD4C25B89D1ADD52AE9A81A8CA60D29428AC7A09F7FBD6E2E20013FD6128E722F79BA6DC7)
用△判别式判断一元二次方程根的三种情况
图片尺寸640x352![2 椭圆的简单几何性质(4)ppt 选修1-1圆锥曲线课件 2,弦长公式: f](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E91DA199166F3CED133C604AE13746A8D332B8E911BC707EC25C7486E835128D8D0830D196636FFC07B9C14855D7941794BC3268EB3AE1C93B92E28F4F5E733CA084ADE1FBFB8514D7C6D274C3AD9AEFC6)
2 椭圆的简单几何性质(4)ppt 选修1-1圆锥曲线课件 2,弦长公式: f
图片尺寸1080x810![根的判别式是判断方程实根个数的公式,在解题时应用十分广泛,涉及到解](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E93CD85C58D1C1402F6D0A71BFF68B12CE46308985CB9D8D043FE05100ECD0E9A265AC87008F3CDFC5D1B2B107502F159D977EE7DD7B788B5682E93618154C3C36864EFBE4EB98B2195C552BC3FFBBC9AE)
根的判别式是判断方程实根个数的公式,在解题时应用十分广泛,涉及到解
图片尺寸600x400![求数学高手 在△abc中,若sina sinb=sinc(cosa cosb) 当c=1时,求a b的](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E9BEE2125389C83429C98255796C4DA91805C636BFAAC61E7036D70EA895978F5AAC87ED1C02E96370D515879BBF50438F8E214691E1C6CF78CC9523010598A7E457911DAC37D2991B3E956650C37D075C)
求数学高手 在△abc中,若sina sinb=sinc(cosa cosb) 当c=1时,求a b的
图片尺寸326x306![二次函数的求根公式是什么?](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A73F01C16D9A6EC72F04E9BEFE949740FD359D4ACA6E826A3127F62E57B4A09039F388F1CDE75E265D0DBF0A6B816E9D381ABBB92A76D224D8B9CF92827E1B27855AEB27AC4AAF49BDBCF16135790D6FF07)
二次函数的求根公式是什么?
图片尺寸257x285![π 42 当 csoa = 0时,= ,ba ,a== b,= 631 ∴△](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E83A5A7DE1D4AE3CBF93D60595FF16EDE44719FBB5A6F00C1D3C65F947675C6E64272E6CD32647A0F447D27501B42EB564F82635632B61E8D1EA49384CD4E8C464B6FD7F679AFC95F38273DA622BD7590D6)
π 42 当 csoa = 0时,= ,ba ,a== b,= 631 ∴△
图片尺寸1080x810![3查看答案和解析 设数列,的值;(Ⅱ)求数列的通项公式.](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E830F6BC21B93057FBDB034A739518090876E3B251CCCE9983CDBC38283E3C252A2E11E31F41527032C8035A641183A25C8197300DDF55A8520851B26C9F6EA20598A691AF13585CD19A593521566729650)
3查看答案和解析 设数列,的值;(Ⅱ)求数列的通项公式.
图片尺寸544x195![b05-4ac 这个△公式怎么去带入题意呢?](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A730CCC9D70990C516344A3DE002F8B51ABE7DA0A31A469CB8872F216E7C2E8AB715348577095B9C60E1B352673E489F83D1B51C1F6A0AA952478142FFCB46848644D04F708B694C515F8E6AB5E44841019)
b05-4ac 这个△公式怎么去带入题意呢?
图片尺寸526x390![在△abc中,用a,b,c分别表示角a,b,c的对边,则下列公式](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A731D5F63D35C7145BEE3AE587E518D8BACE634DDB332769C9FA54D01164F68A863782D635BA18F0CB194CA05FFFCE259ACCF7EBB5EBEC956A9D679DC60566534B90917B561E0B50CF9EDDB0B41BB1EEF08)
在△abc中,用a,b,c分别表示角a,b,c的对边,则下列公式
图片尺寸978x632![简谐运动运动公式推导2(在一般情况的基础上,加上了一个初速度)](https://imgs.wantubizhi.com/img/735A5D1F980B52A636CC46F12F2D1A7314599EBCA7D2A4185E58DE687A705398831C8B7F19D2046C076CF6901052E133F2601BF3A3123F1EE61BD5E41794C3B79F81AD1CC6AA1B96E5C9CEA7FA1A34202E7E93B7A8CBE63C5171B048DE9F00BA)
简谐运动运动公式推导2(在一般情况的基础上,加上了一个初速度)
图片尺寸1440x1007![式中a,b,c是△abc中角a,b,c的对边.](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E83562259BB6A68E40C906B4F10E36B4EC7F9633DB79E716721B3F123C866AF4D4F321EC76E990BC3204A894C78E3EB6C6D7E110BECDD99C320888841D7C2698D6EC5CCEB40CDFF3AD101F2079840A0C6C1)
式中a,b,c是△abc中角a,b,c的对边.
图片尺寸710x622![第四象限查看答案和解析 , (1)求数列{an}的通项公式; (2)求证:数列](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E83E498FD169AF866AA478D1C6A1156F00686C6109F4398DF6849FF65633AD803CAE3FDCCE495D8A1E880619EC97F7FC42BD99DABF316B0066E87C39AC8DEB4E1CC61AA235CC2167170BDD24895D620929D)
第四象限查看答案和解析 , (1)求数列{an}的通项公式; (2)求证:数列
图片尺寸519x385![bc的方程,再令y=0,求出q点横标x=8/7,亦可由三点共线公式求出q点横标](https://imgs.wantubizhi.com/img/ADDA3C5D760C6828B77B505A29D43E8399B73DE1E5FE3925C6F1BF3D7A68AFDB8B89CE9877BC66107B83AB795017F3A574AF5568A032D3CEA494B06FB77B1BBE698FD5704A2828B8EA3F4837EF62C32E6EF8C4903BAE7051705CCB0E322CE7D0)
bc的方程,再令y=0,求出q点横标x=8/7,亦可由三点共线公式求出q点横标
图片尺寸815x740![是不是有一个固定的公式,记得类似一样的题很多,大等腰包小等腰求角](https://imgs.wantubizhi.com/img/A1A61BAA66193547F3A6DD7D8EE527E990802BCF0B4579427EDB2FDA1512A86410D0E3791BCB7FF5BFA0D43F4268B15231D50C8C2E5061893638CA3952194721718876EFA9D0B53E287983E56F9A24DC141B39197D1E2DCB3DE044CB0BADC3C2)
是不是有一个固定的公式,记得类似一样的题很多,大等腰包小等腰求角
图片尺寸341x600