cos(-x)
![谁能画出|cosx| ,cos|x|两图象的差别?](https://i.ecywang.com/upload/1/img0.baidu.com/it/u=2955928410,2093824289&fm=253&fmt=auto&app=138&f=JPEG?w=491&h=599)
谁能画出|cosx| ,cos|x|两图象的差别?
图片尺寸491x599![y=cos(1/x) 图像](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=839590737,2613792470&fm=253&fmt=auto&app=138&f=JPEG?w=988&h=500)
y=cos(1/x) 图像
图片尺寸1000x506![三角函数的一种角的邻边比斜边叫作余弦,记作(由余弦英文cosine简写 )](https://i.ecywang.com/upload/1/img0.baidu.com/it/u=178264743,3626403269&fm=253&fmt=auto&app=120&f=JPEG?w=640&h=341)
三角函数的一种角的邻边比斜边叫作余弦,记作(由余弦英文cosine简写 )
图片尺寸640x341![函数f(x)=cos(ωx φ)的局部图象如下图,那么f(x)的单调递减区间为( )](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=2492175507,3246029581&fm=253&fmt=auto&app=138&f=JPEG?w=588&h=500)
函数f(x)=cos(ωx φ)的局部图象如下图,那么f(x)的单调递减区间为( )
图片尺寸945x803![y=cos(x π/3)的函数简图](https://i.ecywang.com/upload/1/img1.baidu.com/it/u=1362573596,3921167155&fm=253&fmt=auto&app=138&f=JPEG?w=659&h=353)
y=cos(x π/3)的函数简图
图片尺寸659x353![y=2cos1/2x y=2cos(x-π/2) y=cos(1/2x π/4) 这三个函数](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=1295193316,1491325519&fm=253&fmt=auto&app=138&f=JPEG?w=723&h=349)
y=2cos1/2x y=2cos(x-π/2) y=cos(1/2x π/4) 这三个函数
图片尺寸723x349![为什么cos x 等于cos (-x)](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=3455354467,2091755541&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=156)
为什么cos x 等于cos (-x)
图片尺寸590x184![cosπx的图像怎么画](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=3764611412,272810472&fm=253&fmt=auto&app=138&f=JPEG?w=889&h=500)
cosπx的图像怎么画
图片尺寸1024x576![cos(-x 5/兀)单调区间是什么三角函数](https://i.ecywang.com/upload/1/img0.baidu.com/it/u=4009047844,1248904579&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=667)
cos(-x 5/兀)单调区间是什么三角函数
图片尺寸780x1040![求极限lim(x→0)(1-根号cosx)/[x(1-cos根号x)]_360问答](https://i.ecywang.com/upload/1/img1.baidu.com/it/u=1518223587,4047792238&fm=253&fmt=auto&app=138&f=JPEG?w=439&h=268)
求极限lim(x→0)(1-根号cosx)/[x(1-cos根号x)]_360问答
图片尺寸439x268![y=2cos1/2x y=2cos(x-π/2) y=cos(1/2x π/4) 这三个函数](https://i.ecywang.com/upload/1/img1.baidu.com/it/u=3258085253,68673321&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=189)
y=2cos1/2x y=2cos(x-π/2) y=cos(1/2x π/4) 这三个函数
图片尺寸649x245![若0 x π/2,则"xcos^2x 1"是"xcosx 1"的什么条件?数学高中题](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=3319087554,341346684&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=667)
若0 x π/2,则"xcos^2x 1"是"xcosx 1"的什么条件?数学高中题
图片尺寸780x1040![求不定积分∫(cos√x)/√x dx - 微思作业本](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=2424821961,1447262090&fm=253&fmt=auto&app=138&f=JPEG?w=255&h=335)
求不定积分∫(cos√x)/√x dx - 微思作业本
图片尺寸255x335![y = cos(x)](https://i.ecywang.com/upload/1/img0.baidu.com/it/u=2909553983,2231749706&fm=253&fmt=auto&app=138&f=PNG?w=529&h=250)
y = cos(x)
图片尺寸529x250![plots of y = cos x and y = 3 sin x.](https://i.ecywang.com/upload/1/img1.baidu.com/it/u=1341737540,2679457945&fm=253&fmt=auto&app=138&f=PNG?w=884&h=500)
plots of y = cos x and y = 3 sin x.
图片尺寸1054x596![y=2cos(π/4-x/2)(x∈【0,2π】)的递减区间是?](https://i.ecywang.com/upload/1/img1.baidu.com/it/u=716956573,2441397340&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=313)
y=2cos(π/4-x/2)(x∈【0,2π】)的递减区间是?
图片尺寸600x375![a graph of the function cos(x) on the domain , with x-intercepts](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=2388455475,1192931481&fm=253&fmt=auto&app=138&f=PNG?w=300&h=300)
a graph of the function cos(x) on the domain , with x-intercepts
图片尺寸300x300![y=cosx取x=0,π/2,π,3π/2,2π y=cos2x取x=0,π/4,π/2,3π/4,π](https://i.ecywang.com/upload/1/img1.baidu.com/it/u=1602353126,2989715380&fm=253&fmt=auto&app=138&f=JPEG?w=600&h=299)
y=cosx取x=0,π/2,π,3π/2,2π y=cos2x取x=0,π/4,π/2,3π/4,π
图片尺寸600x299![y=1/xcos(1/x) 图像](https://i.ecywang.com/upload/1/img1.baidu.com/it/u=361160345,2079949204&fm=253&fmt=auto&app=138&f=JPG?w=466&h=425)
y=1/xcos(1/x) 图像
图片尺寸466x425![已知函数f(x)=2cos(ωx π/3)的最小正周期为π,求f(x)在[-π/4,π/4]](https://i.ecywang.com/upload/1/img1.baidu.com/it/u=3983461563,2597042300&fm=253&fmt=auto&app=138&f=JPEG?w=298&h=470)
已知函数f(x)=2cos(ωx π/3)的最小正周期为π,求f(x)在[-π/4,π/4]
图片尺寸298x470