求函数y=(cos x-2)⼀(cos x-1)的周期,要过程哦

2024-11-16 19:05:09
推荐回答(1个)
回答1:

y=[cosx-1-1]/(cosx-1)
=1-1/(cosx-1)
=1-1/(1-2sin^2(x/2)-1)
=1+1/(2*sin^2(x/2))
故其周期是 T=2π