> 其他 >
f(x)=sinx-根号三倍cosx的最小值
人气:298 ℃ 时间:2020-02-05 03:04:20
解答
f(x)= sinx-√3cosx
= 2(sinxcosπ/3-cosxsinπ/3)
= 2sin(x-π/3)
-1≤sin(x-π/3)≤1
-2≤2sin(x-π/3)≤2
最小值-2
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版