设f(x)=根号下(1-x),若a属于(5派/4,3派/2) 则f(sin2a)-f(-sin2a)=?
人气:230 ℃ 时间:2020-10-02 01:07:54
解答
f(x)=√(1-x)f(sin2α)-f(-sin2α)=√(1-sin2α)-√(1+sin2α)= √(1-2·sinα·cosα)-√(1+2·sinα·cosα)=√(sin²α+cos²α-2·sinα·cosα)-√(sin²α+cos²α+2·sinα·cosα)=√[...
推荐
- f(x)=1/2cos-1/2sinx,f(a)=(3根号2)/10,求sin2a的值.
- f(x)=2cos^2X-1,且f(a)=根号3/3,a€(0,派/4),求sin2a的值.
- f(x)=a^x过点(0.5,根号2),且f(-x)=g(x)
- .已知函数f(x)=a+根号(- x^2 - 4x ),g(x) =(4/3)x + 1
- 若函数f(x)=x-1(x≤-1),则f(4)的值为()a.根号5 b.-根号5 c.15 d.根号3
- How often do you get this magazine?
- 初一英语50词作文两篇
- 英语完形填空,看不懂
猜你喜欢