(2kπ-π/2,2kπ+π/2)∩[-5,5]

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(2kπ-π/2,2kπ+π/2)∩[-5,5](2kπ-π/2,2kπ+π/2)∩[-5,5](2kπ-π/2,2kπ+π/2)∩[-5,5][-5,-3π/2)∪(-π/2,π/2)∪(3π/2,

(2kπ-π/2,2kπ+π/2)∩[-5,5]
(2kπ-π/2,2kπ+π/2)∩[-5,5]

(2kπ-π/2,2kπ+π/2)∩[-5,5]
[-5,-3π/2)∪(-π/2,π/2)∪(3π/2,5]

2kπ+π kπ-2π/3 已知π+2Kπ 若(2k+1)π kπ和2kπ的区别请问什么时候得用kπ什么时候得用2kπ? 满足函数y=sinx和y=cosx都是增函数的区间是?A【2kπ,2kπ+π/2】k属于zB【2kπ+π/2,2kπ+π】k属于zC【2kπ-π,2kπ-π/2】k属于zD【2kπ-π/2,2kπ】k属于z 下列终边相同的角是【选择题.】A.kπ+π/2与k*90°,k∈ZB.(2k+1)π与(4k±1)π,k∈ZC.kπ+π/6与2kπ±π/6,k∈ZD.(kπ)/3与kπ+(π/3),k∈Z 一[2kπ+a,2kπ+b](k属于Z,0 2kπ=360k(k属于z)吗?如题. 求证:cos(π/2k+1)+cos(2π/2k+1)+…+cos(2k-1)π/2k+1+cos2kπ/2k+1=0 化简:sin(kπ-2)cos[(k-1)π-2]/sin[(k+1)π+2]cos(kπ+2),k属于Z (k*k*k-2k+4)/4k (2kπ-π/2,2kπ+π/2)∩[-5,5] 与300°终边相同的是 A.kπ+π5/3(k∈z) B.2kπ-1π/3(k∈z) C.kπ与300°终边相同的是A.kπ+π5/3(k∈z)B.2kπ-1π/3(k∈z)C.kπ+6π/11(k∈z)D.2kπ+1π/3(k∈z) 编一个程序求π的近似值#include void main(void){double x,y,k=1;while (y>=1e-6){ if(k>0){x=4*1/k+x;y=1/k;k=(k+2)*(-1);}else{k=k*(-1);x=4*1/k*(-1)+x;y=1/(k*(-1));}}cout 2kπ和kπ怎么区别sinx=0x=kπsin(x/2)=0x=2kπ 怎么得出是2kπ还是kπ,和周期有关吗? 若|cosa|=-cosa,则x取值范围A.2kπ≤x≤2kπ+π/2(k∈Z)B.2kπ+π/2≤x≤2kπ+3π/2(k∈Z)C.2kπ+3π/2≤x≤2kπ+2π(k∈Z)D.2kπ+π≤x≤2kπ+3π/2(k∈Z)最好有原因 不等式tanx≦-1的解集是选项:A.(2kπ-π/2,2kπ-π/4](k∈Z) B.[2kπ-π/4,2kπ+3π/2](k∈Z)C.(kπ-π/2,kπ-π/4](k∈Z) D.[2kπ+π/2,2kπ+3π/4](k∈Z)