Задача 53549 x(t)=-3cost+5sint ; t=П/2...

5f69ac18b931bd71f10f347c

22.09.2020 10:48:44

x(t)=-3cost+5sint ; t=П/2

5f3ea7e3faf909182968ddd9

22.09.2020 14:06:59

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v(t)=x`(t)=(-3cost+5sint)`=-3*(cost)`+5*(sint)`=-3*(-sint)+5cos t=3sin t+5cos t

v`(π/2)=3sint+5cost=3sin(π/2)+5cos(π/2)=3*1+5*0=3