作业帮参数方程求二次导数…
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/29 03:38:07
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参数方程求二次导数…
参数方程求二次导数…
参数方程求二次导数…
d^2y/dx^2
=[(dy/dx)/dt]/(dx/dt)
=[(1-sint)/(1+cost)]'/(t+2+sint)'
=[-cost(1+cost)-(1-sint)(-sint)]/[(1+cost)^2*(1+cost)]
=[-cost-cos^2t+sint-sin^2t)/(1+cost)^3
=-(1+cost-sint)/(1+cost)^3.