cos(π/4+x)=5/13.且0
人气：448 ℃ 时间：2020-04-01 22:27:08
解答
1.设a=π/4+x 则cosa=5/13 且π/4
推荐
- 已知cos(π/4+x)=5/13,0＜x＜π/4,求sin(π/4-x)/cos2x
- 已知sin(π/4-x)=5/13,x属于(0,π/4),求(cos2x)/cos[(π/4)+x]
- 已知sin(π／4－x﹚＝5／13,0＜x＜π／4,求[cos2x]／[cos﹙π／4＋x﹚]的值
- 已知sin[(π/4)-x)]=5/13,0
- 已知0小于x小于派/4,sin(派/4 -x)=5/13,求cos2x/cos(派/4 +x)的值.
- It is just the right color I want.这句句子为什么用right 而
- 反应焓是啥吖~
- you can have meals with these things which
猜你喜欢
