[sin^2(x/2)]*[cos^2(x/2)]
=[sin(x/2)cos(x/2)]^2
=[(1/2)*2*sin(x/2)cos(x/2)]^2
=[(1/2)sinx]^2
=(1/4)(sinx)^2
[sin^2(x/2)]*[cos^2(x/2)]
=[sin(x/2)cos(x/2)]^2
=[(1/2)*2*sin(x/2)cos(x/2)]^2
=[(1/2)sinx]^2
=(1/4)(sinx)^2
最新问答: 英语翻译1.unless otherwise specified in this order ,the price pr 设函数y=f(x)在(0,+∞)内有界且可导,为什么不选答案A:limx→+∞ f(x)=0时,必有limx→+∞ f' 英语翻译The initial phase of this new programme has also lead to The umbrella behind the door is kitty's(划线的是behind the door) 2.t℃某饱和氢氧化钙溶液149.48g与草木灰(其主要成分为碳酸钾)5.5g反应,生成2g沉淀.求:(1)草木灰 (2008•崇明县一模)已知函数f(x)=2mx2-2(4-m)x+1,g(x)=mx,若对于任一实数x,f(x)与g( 我的理想英语作文,我要篇初一水平的范文!最好能翻译! 梦想成为电脑程序师现在该如何做的英语作文?求一篇60词左右的英语作文呐!要求:语法正确. 2013x²+2014x+1=0的解是 将拍摄位置的编号填在相应图形下的括号里: 你喜欢和谁一起?谁喜欢和你在一起?请将这句话翻译成英文, Aime Thome de Gamond 为什么碳酸根不可以与氢氧根反应 2边上高相等的三角形是等腰三角形吗?怎么证明? 如果A=2*3*5,B=2*5*7,那么A和B的最大公因数 做饭时如果只关煤气灶的开关,煤气罐的忘关了是不是煤气就要漏出来造成中毒了? went to the hospital / The doctor / helped / ill people / an I go to school ___________ 7: 15 from Monday to Friday. Just wait and see,I won't let you get away with that.怎么翻译比较地 抛物线y=-x2-2x+m,若其顶点在x轴上,则m=______.