早教吧 育儿知识 作业答案 考试题库 百科 知识分享

JackisridingaFerriswheel,wheretistimeinseconds.Explainwhateachofthefollowingrepresents.a.h(3),whereh(t)=7cos(30t)°b.h(3),whereh(t)=7sin(30t)°

题目详情
Jack is riding a Ferris wheel,where t is time in seconds.Explain what each of the following represents.
a.h(3),where h(t)= 7 cos(30t)°
b.h(3),where h(t)= 7 sin(30t)°
▼优质解答
答案和解析
杰克在坐一个摩天轮,t是时间,单位秒.解释下面各个的含义
一个圆参数方程,半径r=7
x=7cos30t
y=7sin30t
3秒时,jack到达顶端