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2025届高中数学一轮复习练习:第五章限时跟踪检测(二十六) 三角函数的图象与性质(含解析)_2.2025数学总复习_2025年新高考资料_一轮复习

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2025届高中数学一轮复习练习:第五章限时跟踪检测(二十六) 三角函数的图象与性质(含解析)_2.2025数学总复习_2025年新高考资料_一轮复习
2025届高中数学一轮复习练习:第五章限时跟踪检测(二十六) 三角函数的图象与性质(含解析)_2.2025数学总复习_2025年新高考资料_一轮复习
2025届高中数学一轮复习练习:第五章限时跟踪检测(二十六) 三角函数的图象与性质(含解析)_2.2025数学总复习_2025年新高考资料_一轮复习
2025届高中数学一轮复习练习:第五章限时跟踪检测(二十六) 三角函数的图象与性质(含解析)_2.2025数学总复习_2025年新高考资料_一轮复习
2025届高中数学一轮复习练习:第五章限时跟踪检测(二十六) 三角函数的图象与性质(含解析)_2.2025数学总复习_2025年新高考资料_一轮复习
2025届高中数学一轮复习练习:第五章限时跟踪检测(二十六) 三角函数的图象与性质(含解析)_2.2025数学总复习_2025年新高考资料_一轮复习
2025届高中数学一轮复习练习:第五章限时跟踪检测(二十六) 三角函数的图象与性质(含解析)_2.2025数学总复习_2025年新高考资料_一轮复习
2025届高中数学一轮复习练习:第五章限时跟踪检测(二十六) 三角函数的图象与性质(含解析)_2.2025数学总复习_2025年新高考资料_一轮复习

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限时跟踪检测(二十六) 三角函数的图象与性质 一、单项选择题 1.函数y=lg(tan 2x)的定义域是( ) A.(k∈Z) B.(k∈Z) C.(k∈Z) D.(k∈Z) 2.若函数f(x)=sin 2x与g(x)=2cos x都在区间(a,b)上单调递减,则b-a的最大值是 ( ) A. B. C. D. 3.函数y=的图象与函数y=sin (-4≤x≤8)的图象所有交点的横坐标之和等于( ) A.4 B.8 C.12 D.16 4.(2024·河北衡水中学调研)若函数f(x)=|tan(ωx-ω)|(ω>0)的最小正周期为4,则在下 列区间中f(x)单调递增的是( ) A. B. C. D.(3,4) 5.(2024·贵州贵阳五校联考)下列可能是函数y=4coscos图象的对称中心的是( ) A. B. C. D. 6.已知函数f(x)=2cos,设a=f,b=f,c=f,则a,b,c的大小关系是( ) A.a>b>c B.a>c>b C.c>a>b D.b>a>c 7.函数f(x)=在[-π,π]上的图象大致为( ) 8.设函数f(x)=cos,则f(x)在上的单调递减区间是( ) A. B. C. D. 9.(2024·安徽皖江名校高三联考)已知函数f(x)=sin(2x+φ)+cos(2x+φ)为偶函数,且 在上单调递增,则φ的一个可能取值为( ) A. B.C. D. 二、多项选择题 10.(2024·广东汕头模拟)对于函数f(x)=|sin x|+cos 2x,下列结论正确的是( ) A.f(x)的值域为 B.f(x)在上单调递增 C.f(x)的图象关于直线x=对称 D.f(x)的最小正周期为π 11.已知函数f(x)=cos2-cos 2x,则( ) A.f(x)的最大值为 B.f(x)的图象关于点对称 C.f(x)图象的对称轴方程为x=+(k∈Z) D.f(x)在[0,2π]上有4个零点 三、填空题与解答题 12.(2024·福建模拟)已知三角函数f(x)满足:①f(3-x)=-f(x);②f(x)=f(1-x);③函 数 f(x) 在 上 单 调 递 减 . 写 出 一 个 同 时 具 有 上 述 性 质 ① ② ③ 的 函 数 f(x) = _____________________________________________. 13.(2024·名师原创)已知函数f(x)=-cos 2x-sin 2x,将f(x)的图象上所有点沿x轴平 移θ(θ>0)个单位长度,得到函数g(x)的图象,且函数g(x)为偶函数,当θ最小时,函数h(x) =2cos(πx-θ)的图象的对称中心的坐标为______________. 14.(2024·浙江杭州模拟)已知函数f(x)=sin+cos-2sin2 . (1)求函数f(x)的单调递增区间; (2)求使f(x)<0成立的实数x的取值集合.高分推荐题 15.(多选)设[x]表示不超过实数x的最大整数,函数f(x)=sin[cos2x]+cos[sin2x],则( ) A.f(x)的最大值为 B.3π为函数f(x)的一个周期 C.f(x)在区间上单调递增 D.∀x∈,f(x)=1 解析版 一、单项选择题 1.函数y=lg(tan 2x)的定义域是( ) A.(k∈Z) B.(k∈Z) C.(k∈Z) D.(k∈Z) 解析:由函数y=lg(tan 2x)有意义得,tan 2x>0,所以kπ<2x0)的最小正周期为4,则在下 列区间中f(x)单调递增的是( ) A. B. C. D.(3,4) 解析:作出函数y=|tan u|的图象如图所示. 由图可知,函数y=|tan u|的最小正周期为π,且其单调递增区间为(k∈Z). 对于函数f(x),其最小正周期T==4,可得ω=, 则f(x)=. 由kπb>c B.a>c>b C.c>a>b D.b>a>c 解析:a=f=2cos,b=f=2cos,c=f=2cos,因为y=cos x在[0,π]上递减,又<<, 所以a>b>c.答案:A 7.函数f(x)=在[-π,π]上的图象大致为( ) 解析:由x∈[-π,π]且f(-x)===-f(x),得f(x)是奇函数,其图象关于原点对称, 排除A;又f==>1,f(π)=>0,排除B,C. 答案:D 8.设函数f(x)=cos,则f(x)在上的单调递减区间是( ) A. B. C. D. 解析:f(x)=cos,由2kπ≤2x-≤2kπ+π,k∈Z,得kπ+≤x≤kπ+,k∈Z,又x∈,∴单 调递减区间为. 答案:D 9.(2024·安徽皖江名校高三联考)已知函数f(x)=sin(2x+φ)+cos(2x+φ)为偶函数,且 在上单调递增,则φ的一个可能取值为( ) A. B. C. D. 解析:根据题意,f(x)=sin(2x+φ)+cos(2x+φ)=2sin, 若f(x)为偶函数,则有φ+=kπ+,k∈Z,即φ=kπ+,k∈Z,所以可以排除B,D; 对于A,当φ=时,f(x)=2sin=2cos 2x,在上单调递减,不符合题意;对于C,当φ= 时,f(x)=2sin=-2cos 2x,在上单调递增,符合题意.故选C. 答案:C 二、多项选择题 10.(2024·广东汕头模拟)对于函数f(x)=|sin x|+cos 2x,下列结论正确的是( ) A.f(x)的值域为 B.f(x)在上单调递增 C.f(x)的图象关于直线x=对称 D.f(x)的最小正周期为π 解析:因为f(x)=|sin x|+cos 2x,x∈R,所以f(-x)=|sin(-x)|+cos(-2x)=|sin x|+ cos 2x=f(x),所以f(x)是偶函数,又f(x+π)=|sin(x+π)|+cos[2(x+π)]=|sin x|+cos 2x= f(x),所以π是函数f(x)的周期,又f=+cos=|cos x|-cos 2x≠f(x),故f(x)的最小正周期为π. 对于A,因为f(x)的最小正周期为π,令x∈[0,π],此时sin x≥0,所以f(x)=sin x+1-2sin2x,令t=sin x,t∈[0,1],所以有g(t)=-2t2+t+1=-22+,可知其值域为,故A,D 正确;对于B,由A可知,g(t)在上单调递增,在上单调递减,因为t=sin x,t∈[0,1],所 以f(x)在上不单调递增,故B不正确;对于C,因为f(0)=1,f=0,所以f(0)≠f,所以f(x)的 图象不关于直线x=对称,故C不正确.故选AD. 答案:AD 11.已知函数f(x)=cos2-cos 2x,则( ) A.f(x)的最大值为 B.f(x)的图象关于点对称 C.f(x)图象的对称轴方程为x=+(k∈Z) D.f(x)在[0,2π]上有4个零点 解析:f(x)=-cos 2x =+-cos 2x =sin 2x-cos 2x+ =sin+, 则f(x)的最大值为,A正确; 易知f(x)图象的对称中心的纵坐标为,B错误; 令2x-=+kπ(k∈Z), 得x=+(k∈Z), 即f(x)图象的对称轴方程,C正确; 由f(x)=sin+=0, 得sin=-, 当x∈[0,2π]时,2x-∈, 作出函数y=sin x的图象,如图所示. 所以方程sin=-在[0,2π]上有4个不同的实根, 即f(x)在[0,2π]上有4个零点,D正确. 答案:ACD 三、填空题与解答题 12.(2024·福建模拟)已知三角函数f(x)满足:①f(3-x)=-f(x);②f(x)=f(1-x);③函 数 f(x) 在 上 单 调 递 减 . 写 出 一 个 同 时 具 有 上 述 性 质 ① ② ③ 的 函 数 f(x) = _____________________________________________. 解析:对于①,若f(3-x)=-f(x),则f(x)的图象关于点中心对称; 对于②,若f(x)=f(1-x),则f(x)的图象关于直线x=对称; 设f(x)=2sin(ωx+φ), 则T=4×=4,ω=, 又f(x)的图象关于直线x=对称,且函数f(x)在上单调递减, 则+φ=+2kπ,k∈Z, 得φ=+2kπ,k∈Z. 所以可令f(x)=2sin,答案不唯一. 答案:2sin(答案不唯一) 13.(2024·名师原创)已知函数f(x)=-cos 2x-sin 2x,将f(x)的图象上所有点沿x轴平 移θ(θ>0)个单位长度,得到函数g(x)的图象,且函数g(x)为偶函数,当θ最小时,函数h(x) =2cos(πx-θ)的图象的对称中心的坐标为______________. 解析:f(x)=-cos 2x-sin 2x=2cos.由五点法作出f(x)=2cos的部分图象,如图. 要使g(x)为偶函数,只需将f(x)的图象向左平移π+(k∈N)个单位长度或者向右平移π 0 +(k∈N)个单位长度.显然θ的最小值为. 1 所以函数h(x)=2cos, 令πx-=kπ+,k∈Z,得x=k+,k∈Z, 故当θ最小时,函数h(x)=2cos(πx-θ)的图象的对称中心的坐标为,k∈Z. 答案:,k∈Z 14.(2024·浙江杭州模拟)已知函数f(x)=sin+cos-2sin2 . (1)求函数f(x)的单调递增区间; (2)求使f(x)<0成立的实数x的取值集合. 解:(1)因为f(x)=sin+cos-2sin2=+-2×=sin x+cos x-1=2-1=2sin-1, 由-+2kπ≤x+≤+2kπ,k∈Z,解得-+2kπ≤x≤+2kπ,k∈Z, 所以f(x)的单调递增区间为,k∈Z. (2)由(1)知,f(x)=2sin-1,由f(x)<0,得sin<, 所以-+2kπ
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  1. CONNECT:[ UseTime:0.000827s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001160s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000567s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000525s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001021s ]
  6. SELECT * FROM `set` [ RunTime:0.000484s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.001277s ]
  8. SELECT * FROM `wendang` WHERE `id` = 370257 LIMIT 1 [ RunTime:0.001296s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 370257 [ RunTime:0.005416s ]
  10. UPDATE `wendang` SET `lasttime` = 1773093324 WHERE `id` = 370257 [ RunTime:0.000935s ]
  11. SELECT * FROM `wendang` WHERE `id` < 370257 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000916s ]
  12. SELECT * FROM `wendang` WHERE `id` > 370257 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000772s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 370257 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002207s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 370257 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009376s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 370257 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007314s ]
0.191560s