> 数学 >
(sinα-cosα)/(sinα+cosα)的取值范围
人气:361 ℃ 时间:2020-10-01 20:28:53
解答
(sinα-cosα)/(sinα+cosα)
=(tanα-1)/(tanα+1)
=(tanα-tanπ/4)/(1+tanαtanπ/4)
=tan(α-π/4)
值域(-∞,+∞)
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版