lilg132 use integration to evaluate the result of : one year ago one year ago

1. lilg132

${Z = \int\limits_{}^{}7\sin3\theta d \theta}$ at $({\pi \over 6},2)$

2. TuringTest

u-substitution$u=3\theta\implies du=3d\theta$

3. TuringTest

$d\theta=\frac73$so the integral becomes$\frac73\int\sin udu$