Cos 2x is also called a Double angle formula as they have 2 or double angles in the trigonometric functions. Practice Cos 2x formula examples and other trigonometric formulas at BYJU'S.
Find sin2x, cos2x, and tan2x if sinx = -3/sqrt10 and x terminates in quadrant 3.Find sin2x, cos2x, and tan2x if sinx = -3/sqrt10 and x terminates in quadrant 3. I've been stuck on this and don't know how to go about it.Follow • 1 Add comment ...
Understand trigonometric functions such as sine, cosine, and tangent. Be familiar with their mnemonic, their formula, and their graphs through the given examples. Related to this Question Explore our homework questions and answers library Search ...
ey=tan(π/4-x)eydy=(-sec2(π/4-x))dx(dy/dx)ey=-sec2(π/4-x)(dy/dx)ey+sec2(π/4-x)=0 结果一 题目 求下列函数y对自变量x的微分 y=Intan(u/2),u=arcsinv,v=cos(2x) 感激不尽 答案 v=sin(π/2-2x) u=arcsinv=π/2-2x e^y=tan(u/2) e^y=tan(π/4-x) e^ydy=...
https://math.stackexchange.com/questions/1956782/what-is-cos2-tan-1x2 Lettan−1x2=u⟹tanu=x2cos{2tan−1x2}=cos2u=1+tan2u1−tan2u=? How to simplifiy (get rid of trig functions ) in(1+tan(arccosx))2 https://www.quora.com/How-do-you-simplifiy-get-rid-of-trig-...
3.解析∵cosx=-1/3,180°x270° °∴sinx=-2/3√2 (1)sin2x=2sinx⋅cosx=4/9√2 ,cos2x= 2cos^2x-1=-7/9 tan2x=(sin2x)/(cos2x)=-4/7√2sin 2x4cos 2x7(2 ∵90°x/2135°∴sinx/2=√((1-cosx)/2) =(√6)/3 cosx/2=-√((1+cosx)/2)=-(√3)/3 tanx/2= (a...
解:\((I)∵\)5111x=2c0sx,则CosX≠,\(∴\)tan x=2,\(∴\)2tan x tan 2x 1-tanx 2×2 4 1-2 2; \((\)Ⅱ\()\) 原式 cos22x-sin 2x √2 √2 cos 2x-sin 2x sin 2x 2 2 √2(cos2x-sin2x)(cos2x+sin2x) (cos2x-sin2x)·sin2x 2 cos 2x+sin 2x sin 2x ...
百度试题 结果1 题目6)设f(x)=ktan2x的一个原函数为-Incos2x+3, 则k=4 相关知识点: 试题来源: 解析 答案— 解析 考查积分,求导 (1/4lncos2x+3)=1/4((-2sinx))/(cos2x)=-1/2tan2x 对Ms2x+3,术导,, ∴k=-1/2 反馈 收藏
___求不定积分:Inxtan— In 1 cos 2xnexdx,n为自然数。较复杂的分部积分法的考察。C1。:基本思路一一严格按照“反、对、
f(x)=(s i nx)/(sqrt(1+tan^2x))+(cos x)/(sqrt(1+cot^2x)) is constant in... 07:14 Q. Let n be an add integer if sin ntheta = sum(r=0)^n(br)sin^rtheta, f... 04:15 For a positive integer n , let fn(theta)=(tantheta//2)(1+sectheta)(1+s... 10:42 If si...