已知0＜a＜π/2,0＜β＜π/2且tana=1/7,tanβ=3/4求a+β
人气：258 ℃ 时间：2020-04-13 17:41:26
解答
tan(A+B) = (tanA+tanB)/(1-tanAtanB)=(1/7+3/4)/(1-1/7x3/4)=1 所以a+b=π/4
推荐
- 已知tan(a+b)=7,tana=3/4,且b属于(0,π),则b=
- 已知tana=1/7,tanβ=1/3,求tan（a+2β）
- 已知tana=1/7,tanb=1/3,求tan(a+2b)的值?
- 已知tana/2=2求tan(a+π/4)
- 若a、β∈(0,π/2),tana=4/3,tanβ=1/7,则a-β_______
- Teaching high school students in a poor mountain village may not sound like fun to you,求句子成分
- —There is a knock at the door.—---------------?A.who is that?B.who can it be?...
- 一颦一笑一回眸 半梦半真半苍茫什么意思
猜你喜欢
