一个微积分的题 A lighthouse is fixed 100 feet from a straight shoreline.A spotlight revolves at a rate of 16 revolutions per minute,(32 rad/min ),shining a spot along the shoreline as it spins.At what rate is the spot moving when it is along t

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一个微积分的题 A lighthouse is fixed 100 feet from a straight shoreline.A spotlight revolves at a rate of 16 revolutions per minute,(32 rad/min ),shining a spot along the shoreline as it spins.At what rate is the spot moving when it is along t
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一个微积分的题 A lighthouse is fixed 100 feet from a straight shoreline.A spotlight revolves at a rate of 16 revolutions per minute,(32 rad/min ),shining a spot along the shoreline as it spins.At what rate is the spot moving when it is along t
一个微积分的题
A lighthouse is fixed 100 feet from a straight shoreline.A spotlight revolves at a rate of 16 revolutions per minute,(32 rad/min ),shining a spot along the shoreline as it spins.At what rate is the spot moving when it is along the shoreline 16 feet from the shoreline point closest to the lighthouse?

一个微积分的题 A lighthouse is fixed 100 feet from a straight shoreline.A spotlight revolves at a rate of 16 revolutions per minute,(32 rad/min ),shining a spot along the shoreline as it spins.At what rate is the spot moving when it is along t
Solution:
Let O be the position of lighthouse.
Let A be the point on the shoreline closest to the lighthouse.
Let P be the point on the shoreline spotted by the lighthouse at a moment.
Let r be the distance between O and P.
Let θ be the angle between OA and OP.
∵Angular speed = 32π/min
∴Tangetial speed at point P = 32πr
∴Linear speed of point P moving along the shoreline
= 32πr/cosθ
= 32πr/(100/r)
= 8πr²/25
= 8π(100²+16²)/25
= 82048π/25
≈ 10310.46 (feet/min)

这哪是微积分的题啊，这分明是一道英语题。哈哈看不懂

一个微积分的题 A lighthouse is fixed 100 feet from a straight shoreline.A spotlight revolves at a rate of 16 revolutions per minute,(32 rad/min ),shining a spot along the shoreline as it spins.At what rate is the spot moving when it is along t NCE2的Lesson41课后习题It looked like a lighthouse.It ______ a lighthouse.It looked like a lighthouse.It ______ a lighthouse.A appeared similarB resembledC matchedD likened为什么A不对? Lighthouse Family 的Free 歌词翻译 帮忙算一个微积分的题 有关于微积分的一个证明题, 求助一个微积分题帮忙解一道微积分题,求积分的.请给出过程. 请一个微积分高手帮我做一下这个微积分的证明题 大一的一个微积分题目 关于微积分的一个疑问 第二题第一个.微积分 一道微积分的题 微积分极限的题 微积分的题,看不懂, 微积分的题 微积分的题. 微积分的函数题, 微积分的题,求教 微积分的题.