您的位置: 首页 > 作业答案 > 数学 > ∫sin^2xdx

∫sin^2xdx

分类: 作业答案 • 2021-12-28 11:09:27

问题描述：

∫sin^2xdx

答

答：
由cos2x=1-2(sinx)^2得：(sinx)^2=1/2-cos2x/2
∫(sinx)^2dx
=∫ 1/2-cos2x/2 dx
=x/2-sin2x/4 + C

求f(x)=1-2sin^2x+cosx x∈R的值域
f(x)=2sin^2x-cosx-1的值域
求 f(x)=sin平方x+cosx+2cos2x+3-4cos平方x 的值域
方程sin(x+pai/3)=m/2在大于等于0小于等于pai上有两个解,求m的取值范围?
关于x的方程x2+4xsina+atana=0有两个相等实根,1.求a取值范围,（2）当a=7/4时,求sin(pai/4+a)
What is the difference between sin30 and sin 30 degreeHi!Currently,I am studying trigonometry,and I bought a new Texas Instrument Calculator that was made in China.But When I input sin (30),it gave me an answer of -0.9880316241.That is freaking incorrect.But trickily,when I input sin (30ْ),it gave 0.5 which is a correct one.Additionally,I need to work on huge math packet everyday; so I want to get it done as fast as possible.And I at least need to pre
三角函数的数学题谁能帮我解答?1.（口答）设a是三角形的一个内角,在sin a,cos a,tan a中哪些有可能是取负值?2.已知角a的终边上有一点的坐标是P（3a,4a）,其中a不能为0,求sin a,cos a,tan a的三角函数值.请答题着写出步骤,不然我不能理解.
解答5道数学题（三角函数）1.已知 cos(π+α)=-(3/5),且α是第四象限角,则sin(α-(7/2)π)2.若f(cosx)=cos2x,则f(sin15°)的值为3.已知函数f(x)是定义在R上的偶函数,且在区间[0,+∞)上是增函数,另a=f(sin(2π/7)),b=f(cos(5π/7)),c=f(tan(5π/7)),比较a、b、c的大小关系4.若cosα=(1/5),且α是第四象限的角,则cos(-(17π/2)-α)等于多少?5.若角α的终边经过点 p(-x,-6),且cosα=-(5/13),则tanα等于多少?
数学达人帮助求极限!当x->0时sin(x)=x+o(x)x*cos(x)=x-x^3/2!+o(x^3)sin(x)^3=x^3+o(x)lim(sin(x)-x*cos(x)/sin(x)^3=1/2请问错在哪里?谢谢!
数学题问答（三角函数）已知sinα的值,在区间[﹣pai/2,pai/2]内求角αsinα=√3/2; sinα=﹣√2/2; sinα=﹣1/2; sinα=1; sinα=1/4; sinα=﹣5/8; sinα=0.688; sinα=﹣0.123.已知sinα的值，在区间[﹣pai，pai]内求角αsinα=√2/2；sinα=﹣√2/2
《穷人》渔夫和桑娜导致贫穷的原因可能是的什么?
yes,she is my mother.根据答语完成问句

∫sin^2xdx

相关推荐