cos3α=4cosα·cos(π/3+α)cos(π/3-α)tan3a = tan a · tan(π/3+a)· tan(π/3-a)三倍角公式推导 sin3a =sin(2a+a)=sin2acosa+cos2asina 辅助角公式 Asinα+Bcosα=(A^2+B^2)^(1/2)sin(α+t)...
If alpha=cos((2 pi)/(5))+i sin((2 pi)/(5)), then find the value of alpha+alpha^(2)+alpha^(3)+alpha^(4) ((1+sin2 alpha)/(cos(2 alpha-2 pi)tan(alpha-(3 pi)/(4)))-(1)/(4)sin2 alpha(cot((alpha)/(2))+cot((3 pi)/(2)+(alpha)/(2)) simplifies and reduces ...
2) => "+languages.alpha2ToAlpha3T("de")+" (Alpha-3 T)");// de (Alpha-2) => deu (Alpha-3 T)varlanguages=require("@cospired/i18n-iso-languages");console.log("de (Alpha-2) => "+languages.alpha2ToAlpha3B("de")+" (Alpha-3 B)");// de (Alpha-2) => ger (Alpha-3 B...
Let alpha=(pi)/(5) and A,=[[cos alpha,sin alpha-sin alpha,cos alpha]] then B=A^(4)-A^(3)+A^(2)-A is View Solution If alpha=cos((8 pi)/(11))+i sin((8 pi)/(11)) then Re(alpha+alpha^(2)+alpha^(3)+alpha^(4)+alpha^(5)) is ...
扇形面积相当于是这个角度所占圆形角360°的多少:S_{扇}=\pi r^2\frac{\alpha}{2\pi}=\frac{1}{2}\alpha r^2; 弧长相当于是这个弧占圆的周长所对应的多少:l_{弧}=2\pi r\frac{\alpha}{2\pi}=\alpha r 节选自2011年上半年编撰的高一教材 ...
varlanguages=require("@cospired/i18n-iso-languages");console.log("de (639-1/Alpha-2) => "+languages.getName("de","en"));// Germanconsole.log("en (639-1/Alpha-2) => "+languages.getName("de","de"));// Deutschconsole.log("de (639-2T/Alpha-3) => "+languages.getName("deu...
5化.简 \$\frac { \cos ( \alpha + 2 \pi ) \tan ( \pi + \alpha ) \sin ( - \alpha ) } { \cos ( - \alpha ) \tan ( \pi - \alpha ) }\$ 相关知识点: 试题来源: 解析 \$= \frac { \cos \alpha \cdot \tan \alpha \cdot ( - \sin \alpha ) } { \cos ...
结果1 题目 化简: \frac{ \sin ( \alpha -2 \pi ) \cdot \tan (- \alpha ) \cdot \cos (- \alpha +2 \pi )}{ \sin ( \pi - \alpha ) \cdot \sin (3 \pi + \alpha )}. 相关知识点: 试题来源: 解析 综上所述,结论是: 反馈 收藏 ...
解析:cosalpha;=-35,alpha;isin;(pi;2,pi;),所以sinalpha;=45,there4;tanalpha;=sinalpha;cosalpha;=-43.相关知识点: 试题来源: 解析 答案:-43 解析:cosalpha;=-35,alpha;isin;(pi;2,pi;),所以sinalpha;=45,there4;tanalpha;=sinalpha;cosalpha;=-43.反馈...
\displaystyle\left\{ x|x\in R,x\ne k\pi+\frac{\pi}{2},k\in Z \right\} ②值域(R_{f}): R ③周期(T): π(在定义域内) ④奇偶性: 奇函数(在定义域内) ⑤单调性: 在\displaystyle(k\pi-\frac{\pi}{2},k\pi+\frac{\pi}{2})(k\in Z)上单调递增。 ⑥最值: 无最大、小...