= 12 sin2xcos2xco4xcos8x = 14 sin4xco4xcos8x = 18 sin8xcos8x = 116 sin16x (2) tan20°+tan40°+tan120°tan20°tan40° = tan60°⎛ ⎛| |⎝⎞⎟⎠1-tan20°tan40°+tan120°tan20°tan40° = 3- 3tan20°tan40°- 3tan20°tan40° =- 3 故答案为: (1) 116sin16...
答案 (sinx*cosxcos2xcos4xcos8x)/sinx sin2xcos2xcos4xcos8x/2sinx sin4xcos4xcos8x/4sinx sin8x*cos8x/8sinx sin16x/16sinx 相关推荐 1 三角函数规律问题 谁会求这个式子啊!cosxcos2xcos4xcos8x=? 还有一个题 已知2sinx+3siny=a ,2cosx-3cosy=b,求cos(x+y)? 反馈...
cos4x=cos4x+4cos2x+38 cos5x=cos5x+5cos3x+10cosx16 cos6x=cos6x+6cos4x+15cos2x+1032 cos7x=cos7x+7cos5x+21cos3x+35cosx64 cos8x=cos8x+8cos6x+28cos4x+56cos2x+35128 cos9x=cos9x+9cos7x+36cos5x+84cos3x+126cosx256 ⋮ cos2nx=∑m=0n−1C2nmcos2(n−m)x22n−1+C2nn4n ...
首先根据sin2a=2sinacosa 得 F(x)=1/2sin2xcos2xcos4xcos8x =1/4sin4xcos4xcos8x =1/8sin8xcos8x=1/16sin16x ∴ F(x)一阶导=cos16x 二阶导=-16sin16x n阶导=16的n-1次方乘以sin(16x+nπ/2)
सिद्ध कीजिए कि - cosxcos2x cos 4x cos 8x=(sin 16x)/(16sinx) 02:51 सिद्ध कीजिए कि - (1-cos2x+sinx)/(sin 2x+cosx)=tanx 02:36 यदि A+B+C=pi, निम्न को सिद्ध कीज...
相关知识点: 试题来源: 解析 -1/(256)xcos16x+1/(4096)sin16x+C ,提示:∫xsinxcosxcos2xcos4xcos8xdx =1/(16)∫(xsin16xdx=-1/(256))∫xdcos16x 256xdcs16x1=xcos 16x +256cos16dx=-1/(256)xcos16x+1/(4096)sin16x+C; 反馈 收藏 ...
结果一 题目 cosx乘cos2x乘cos4x乘cos8x的导数 答案 都乘以sinx原式=sinx*cosx*cos2x*cos4x*cos8x/sinx=1/2sin2x*cos2x*cos4x*cos8x/sinx=1/4sin4x*cos4x*cos8x/sinx=1/8sin8x*cos8x/sinx=1/16 sin16x/sinx后面就很简单了吧.相关推荐 1cosx乘cos2x乘cos4x乘cos8x的导数 ...
यदि f(x)=cosxcos2xcos4xcos8xcos16x हो तो f'(x) का मान होगा
y=2sinx*cosx*cos2x*cos4x*cos8x/2sinx =sin2x*cos2x*cos4x*cos8x/2sinx =2sin2x*cos2x*cos4x*cos8x/4sinx 以此类推y=(1/16sinx)*sin16x y'=(cos16x*sinx-cosx*sin16x)/(16*sinx^2)
cosx=sin2x2sinxWe will apply this identity iteratively to express f(x). Step 2: Apply the identity1. First application: f(x)=cosxcos2xcos4xcos8xcos16x Rewrite cosx: f(x)=sin2x2sinxcos2xcos4xcos8xcos16x 2. Second application: Rewrite cos2x: f(x)=sin2x2sinx⋅sin4x2sin2xcos4xcos...