解析 Sh(x y)=shxchy chxshy ch(x y)=chxchy shxshy空格是 加号,打不出来结果一 题目 求证:sh2x=2shxchx,ch2x=ch2x+sh2x 答案 Sh(x y)=shxchy chxshych(x y)=chxchy shxshy空格是 加号,打不出来 相关推荐 1 求证:sh2x=2shxchx,ch2x=ch2x+sh2x ...
sh2x=ch2x﹣sh2x C. sh(x+y)=shxchy+chxshy D. ch(x+y)=chxchy+shxshy 相关知识点: 试题来源: 解析 [解答]解:对于选项A,, ch2x+sh6x===ch2x, 故选项A正确; 对于选项B,, ch6x﹣sh2x===1, 故sh3x≠ch2x﹣sh2x, 故选项B错误; 对于选项C,, shxchy+chxshy=•+•==sh(x+y), ...
求证:sh2x=2shxchx,ch2x=ch²x+sh²x 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 Sh(x y)=shxchy chxshy ch(x y)=chxchy shxshy空格是 加号,打不出来 解析看不懂?免费查看同类题视频解析查看解答 相似问题 若z=x+iy,试证明|sin²z|=sin²x+sh²y 已知函数...
举报 求证:sh2x=2shxchx,ch2x=ch²x+sh²x 下载作业帮APP学习辅导没烦恼 答案解析 结果1 举报 Sh(x y)=shxchy chxshy ch(x y)=chxchy shxshy空格是 加号,打不出来 APP内打开 为你推荐 查看更多 若z=x+iy,试证明|sin²z|=sin²x+sh²y 26530 ...
A series of novel trifunctional tetraorganylsilanes of the general formula types MeSi(CH2X)3 (X = I (2), OAc (3), OH (4), Br (5), (4-methylphenyl)sulfonyloxy (6), phthalimido (7), NH2·HBr (8·3HBr)), MeSi(CH2X)2CH2X′ (X = SH, X′ = OH (9); X = Cl, X′ ...
故选项A正确;[分析]直接利用题中给出的双曲正弦函数和双曲余弦函数∠A,分别代入选项的四个等式中进行计算,即可判断得到答案.[解答]解:对于选项A,,ch2x+sh6x==∠ACB=90°=∠A=ch2x,故选项A正确;对于选项B,,ch6x﹣sh2x===1,故sh3x≠ch2x﹣sh2x,故选项B错误;对于选项C,,shxchy+chxshy=•+•∠...
解析 解(1) y=sh(sh x)×(sh x)=sh(sh x)×ch x . (2) y=ch x×ech x+sh x×ech x×sh x=ech x(ch x+sh2x) . (3). (4) y=3sh2x×ch x+2ch x×sh x =sh x×ch x×(3sh x+2) . (5). (6). (7). (8) . (9) . (10) ....
The Cs + /DMF mediated reactions of 1,2,4,5-tetra(bromomethyl)benzene and 1,2,4,5-tetra(bromomethyl)3,6-bis(ethoxy)benzene with dithiols HSCH 2 CH 2 XCH 2 CH 2 SH (X=S,O) were explored in order in order to ascertain the effect of structural variations on the regioselectivity of...
答案 解析 (chx)^2+(5hx)^2=((e^x+e^(-x))/2^2+((e^x-e^(-x))^2)/2 =(e^(2x)+2+e^(-2x)+e^(2x)-2+e^(-2x)+x)/x ∴ch2x=khx^2+|5hx)^2 解析 ∵|chx^2-|sinx|^2=|(e^x+e^(-x))/2^2=((e^x-e^(-x))/2)^2 ∵sh_2x=(e^(2x)-e^(-2x...
解(1) ysh(sh x)(sh x)sh(sh x)ch x 。(2) ych xech xsh xech xsh x=ech x(ch xsh2x) (3)。(4) y3sh2xch x+2ch xsh x sh xch x(3sh x2) 。(5)、(6)(7)(8)(9)、(...