1个回答
展开全部
x=sint =>dx/dt = cost
y=tsint +cost => dy/dt = tcost + sint - sint = tcost
dy/dx = (dy/dt )/(dx/dt ) = tcost/cost = t
d^2y/dx^2
=d/dt ( dy/dx ) / (dx/dt)
=1/cost
d^2y/dx^2 | t=π/4
=1/cos(π/4)
=√2
y=tsint +cost => dy/dt = tcost + sint - sint = tcost
dy/dx = (dy/dt )/(dx/dt ) = tcost/cost = t
d^2y/dx^2
=d/dt ( dy/dx ) / (dx/dt)
=1/cost
d^2y/dx^2 | t=π/4
=1/cos(π/4)
=√2
本回答被提问者采纳
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询