operatorname { rrr } ∫ (from 0 to frac { 3 pi) of { 4}}(y)(2tany/3) wrt y सोडवा

$$\operatorname { rrr } \int _ { 0 } ^ { \frac { 3 \pi } { 4 } } ( y ) ( 2 \tan \frac { y } { 3 } ) d y$$

मूल्यांकन करा

$$r^{3}\int _{0}^{\frac{3\pi }{4}}2y\tan(\frac{y}{3})\mathrm{d}y$$

r संदर्भात फरक करा

$$3r^{2}\int _{0}^{\frac{3\pi }{4}}2y\tan(\frac{y}{3})\mathrm{d}y$$