Find all solutions of the equation in the interval [0,2pi) cscθ+2=0 Write answer in radians in terms of pi?
回答 (4)
2016-11-23 8:37 pm
cscθ + 2 = 0
cscθ = −2
sinθ = −1/2
θ = 7π/6, 11π/6
2016-11-24 9:37 pm
1 / sin Ө = - 2
sin Ө = - 1 / 2
Ө = 7π/6 , 11π/6
sin Ө = - 1 / 2
Ө = 7π/6 , 11π/6
2016-11-24 7:59 pm
cosx+2=0
cosx=-2 (impossible since -1<=cosx<=1)
cosx=-2 (impossible since -1<=cosx<=1)
2016-11-23 8:29 pm
θ = 7pi/6 , 11pi/6
收錄日期: 2021-04-23 23:49:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161123122504AApEmcJ