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cost多少
cost
=1/x问t 等于
多少
答:
x=1/
cost
cost=1/x t=arccos(1/x)
cost
什么时候加s
答:
The blue pants cost more than the green pants 要看主语,第一句主语the blue pants, 属于复数名词,动词cost就不加s The purple bicycle
costs
less than the green bicycle 这句主语 bicycle为单数,动词cost加s 这就是所谓的第三人称单数谓语动词的用法 ...
-2sint/
cost
等于
多少
答:
-2sint/
cost
等于-2tant 因为tana=sina/cosa,将t代入a得 tant=sint/cost -2sint/cost=-2tant
cost
-sint等于
多少
答:
解:(1)
cost
-sint=-(sint-cost)=-2^1/2sin(t-pai/4)(2)cos^2t-sin^2t =cos2t。答:cost-sint=-2^1/2sin(t-pai/4)cos^2t-sin^2t =cos2t。
不定积分td
cost
等
多少
?
答:
分部积分法
积分cos²td(
cost
)等于
多少
?
答:
∫ cos²t d(
cost
) = (1/3)cos³t + c
cost
不能用人作主语。解释一下
答:
Smokers
cost
the government a lot of money every year.抽烟的人每年要耗费政府不少钱。2.从所涉及的宾语来看 cost的宾语通常是钱,take的宾语通常是时间,而spend的宾语则可以是时间或钱。如:How much did it cost to build the bridge?建这座桥花了
多少
钱?It took her two hours to walk ...
y=
cost
-1的有效值是
多少
答:
y=
cost
-1的有效值是
多少
我来答 1个回答 #热议# 如何缓解焦虑情绪?若季heart 2016-01-14 · TA获得超过1万个赞 知道大有可为答主 回答量:5187 采纳率:66% 帮助的人:3367万 我也去答题访问个人页 关注 展开全部 已赞过 已踩过< 你对这个回答的评价是? 评论 收起 ...
这本书花了
多少
钱? 用spend,take,pay,
cost
分别翻译
答:
How much money did you spend on this book?How much money did this book take you?How much (money) did you pay for this book?How much (money) did this book
cost
?括号表示可省略。
t2乘
cost
的原函数是
多少
答:
∫t^2costdt =∫t^2dsint =t^2sint-2∫tsintdt =t^2sint+2∫td
cost
=t^2sint+2tcost-2∫costdt =t^2sint+2tcost-2sint =(t^2-2)sint+2tcost
棣栭〉
<涓婁竴椤
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涓嬩竴椤
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