>
数学
>
tan15度+cot15度等于多少?
如题
人气:320 ℃ 时间:2020-04-06 03:35:32
解答
半角公式 sin(α/2)=±√[(1-cosα)/2] cos(α/2)=±√[(1+cosα)/2] tan(α/2)=±√[(1-cosα)/(1+cosα)]=(1-cosα)/sinα=sinα/(1+cosα) 符号由象限决定 tan15°=(1-cos30°)/sin30°=(1-√3/2)/(1/2)=2-√3 si...
推荐
tan15度减cot15度的值为?
tan15度+cot15度
tan15°+cot15°的值是_.
tan15度等于多少
tan15度等于0.268是怎么算出来的,用的什么方法,
My birthday is 【 1.in 2.on 3.at】Sunday 选哪个
爱莲说中写莲为什么还提到了菊和牡丹,有什么作用
Unfortunately you'll have to pay the fine before you check those books out.
猜你喜欢
My father drove me to school as ______ (usually)
有理数的加减乘除混合运算的方法
有几个英语词组连成一篇小短文
It's important for us students ( )(not talk) and( )(listen)carefully in class.
51页17.The doctors are trying ----a new kind of medicine to cure the patient
帮俺修改一下作文,各位大侠帮我看看啦
为了使灯泡经久耐用,常用灯泡里面充的气体是( ) A.二氧化碳 B.氧气 C.氮气或稀有气体 D.氮气和氧气
毁灭 近义词
© 2024 79432.Com All Rights Reserved.
电脑版
|
手机版