cos(π/4+x)=3/5,17π/12
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 01:34:23
cos(π/4+x)=3/5,17π/12cos(π/4+x)=3/5,17π/12cos(π/4+x)=3/5,17π/12cos(π/4+x)=3/5,cos2(π/4+x)=2[cos(π/4+
cos(π/4+x)=3/5,17π/12
cos(π/4+x)=3/5,17π/12
cos(π/4+x)=3/5,17π/12
cos(π/4+x)=3/5,cos 2(π/4+x) = 2 [cos (π/4+x)]^2 -1 = 2* (9/25) -1 = - 7/25 = cos (π/2+ 2x) = - sin 2x
sin 2x= 7/25 ; cos[π/4+(π/4+x)] = cosπ/4* cos(π/4+x)- sin π/4*sin[(π/4+x)]= 1/2 (2^(1/2)* (3/5) - 1/2 (2^(1/2)* (-4/5) = 7* 2^(1/2)/10 = cos (π/2+x) = - sin x,sin x= -7* 2^(1/2)/10,tan x = 1/7,finally,answer is :
(7/25) + 2* (49/625)/ [1- (1/49)]
cos(π/4+x)=3/5,17π/12
cos(π/4+X)=3/5,17π/12
cos(π/4+x)=3/5,17π/12
cos(π/4+x)=3/5,17π/12
cos(π/4+x)=3/5,17/12π
cos(π/4+x)=3/5,17π/12
cos(π/4+x)=3/5,17π/12
cos(π/4+x)=3/5,-17π/12
cos(2x-π)/[根号2cos(x+π/4)]=-1/5,0
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cos(x+45º)=3/5且17π/12<x<7π/4,求(sin2x+2cos²x)/1-tanx的值注意!括号里加的是cos^2x
y=cos(π/3-x)cos[π/2(x-1)]判断奇偶性y=cos(π/3-x)cos(π/3+x)判断奇偶性
三角函数解方程 (cos 3x)^3+ (cos 5x)^3 = 8 (cos 4x)^3 (cos x)^3
已知cos(π/4+x)=3/5 ,0
化简sin(3π-x)cos(x-3/2)cos(4π-x)/tan(x-5π)cos(π/2+x)sin(x-5/2π)
化简sin(3π-x)cos(x-3/2)cos(4π-x)/tan(x-5π)cos(π/2+x)sin(x-5/2π)
为什么cos(2x-π/3)-sin(5π/6) =cos(2x-π/3)?
三角函数运算 为什么 cos2x+cos( 4π/3 -2x)=cos( π/3 +2x)