人气:485 ℃ 时间:2020-02-05 12:10:45
解答
∵
tanα=,α为锐角∴
cosα=∴
=sinα(2cos2α-1) |
2sinαcosαcos2α |
==.
推荐
- 已知tan(π/4+α)=2 ,1.求tanα的值 2,sin2α+sin^2α+cos2阿尔法的值
- 已知tan(阿尔法+派/4)=1,求,tan阿尔法的值,求,sin2阿尔法-cos阿尔法的平方/1+cos2阿尔法的值
- 已知α为锐角,且tanα=1/2,求sin2αcosα-sinαsin2αcos2α的值.
- 已知α为锐角,且tanα=1/2,求(sin2αcos2α-sinα)/(sin2αcos2α) 的值
- 已知锐角α满足cosα-sinα=√5/5,则(sin2α-cos2α+1)/(1-tanα)=
- Look!They _____(play) football on the playground.
- log4 (x+3)+log(1/4) (x-3)=log(1/4) (x-1)+log4 (2x+1)的解集,
- lock arms if caught in sandstorm
猜你喜欢