已知sin(x+π/6)=1/4,求sin(7π/6+x)+cos(5π/6-x)平方的值已知sin(x+π/6)=1/4,求sin(7/6π+x)+cos(5/6π-x)平方的值

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/26 05:35:30
已知sin(x+π/6)=1/4,求sin(7π/6+x)+cos(5π/6-x)平方的值已知sin(x+π/6)=1/4,求sin(7/6π+x)+cos(5/6π-x)平方的值已知sin(x+π/

已知sin(x+π/6)=1/4,求sin(7π/6+x)+cos(5π/6-x)平方的值已知sin(x+π/6)=1/4,求sin(7/6π+x)+cos(5/6π-x)平方的值
已知sin(x+π/6)=1/4,求sin(7π/6+x)+cos(5π/6-x)平方的值
已知sin(x+π/6)=1/4,求sin(7/6π+x)+cos(5/6π-x)平方的值

已知sin(x+π/6)=1/4,求sin(7π/6+x)+cos(5π/6-x)平方的值已知sin(x+π/6)=1/4,求sin(7/6π+x)+cos(5/6π-x)平方的值
因为sin(x+π/6)=1/4,所以sin(7π/6+x)=sin(π+π/6+x)=-sin(x+π/6)=-1/4,
cos^(5π/6-x)=cos^(π-(π/6+x))=cos^(x+π/6)=1-sin^(x+π/6)=1-/16=15/16.
sin(7π/6+x)+cos^2(5π/6-x)=-1/4+15/16=11/16

shi 5

已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2(π/3-x) 已知sin(x+π/3)=1/4,求sin(2π/3-x)+cos²(π/6-x) 已知sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x) 已知 Sin(X+ 派/6)=1/4求 Sin(5/6派 - X)+Sin^2 (派/3 -X) 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2(11π/6-x)如题, 已知sin(x+6/π)=4/1,求sin(6/5π-x)+sin^2(3/π-x)的值 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin方(π/3-x)的值 傅里叶级数作图f(x)=2sin[x] - sin[2x] + 2/3sin[3x] - 1/2sin[4x]我用mathematica输入程序Plot[{2sin[x],-2sin[x],2sin[x] - sin[2x],-2sin[x] + sin[2x],2sin[x] - sin[2x] + 2/3sin[3x],-2sin[x] + sin[2x] - 2/3sin[3x],2sin[x] - sin[2x] + 2/3si 已知sin[a-b]cos a-cos[b-a]sin a=3/5,b是第三象限角,求sin[b+5π/4]的值第一题1/2cos x-√3/2sin x第二题√3sin x+cos x第三题√2[sin x-cos x]第四题√2cos x-√6sin x 已知-π/2<x<0,sin x+cos x=1/5求sin 2x+2 sin 已知tan(x+π/6)=2,(1)若x∈(π/2,π),求sin(π/3-x)的值;(2)求sin(x+7π/6)sin(x-4π/3)的值 已知α为锐角,且sin²α-sinαcosα-2cos²α=0 (1)求tanα的值 (2)求si已知α为锐角,且sin²α-sinαcosα-2cos²α=0(1)求tanα的值(2)求sin(α-π/3)的值求详解 已知f(x)=cos^2x/1+sin^2x求f'(π/4)求导 已知sin(π/4+x)sin(π/4-x)=1/6,x属于(π/2,π),求sin4x的值 已知sin(x+4分之π)sin(4分之π-x)=6分之1,x∈(2分之π,π),求sin4x的值 已知sin(x+π/6)=1/4,.求sin(7π/6+x)+cos2(5π/6-x)的值 已知sin(x+π/6)=1/4,求sin(x+7π/6)+cos^2 (11π/6-x)的值答案是11/16 已知:sin(x+π/6)=1/4,求sin(x+7π/6)+cos^2 (5π/6-x)的值