Find $\int \sec ( 3 x ) \tan ( 3 x ) d x$
A) $\sec 3 x + C$
B) $\frac { 1 } { 2 } \sec ^ { 2 } 3 x + C$
C) $\frac { 1 } { 3 } \sec 3 x \tan 3 x + C$
D) $\frac { 1 } { 3 } \sec 3 x + C$

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The Answer of Find $\int \sec ( 3 x ) \tan ( 3 x ) d x$
A) $\sec 3 x + C$
B) $\frac { 1 } { 2 } \sec ^ { 2 } 3 x + C$
C) $\frac { 1 } { 3 } \sec 3 x \tan 3 x + C$
D) $\frac { 1 } { 3 } \sec 3 x + C$

Find ∫sec⁡(3x)tan⁡(3x)dx\int \sec ( 3 x ) \tan ( 3 x ) d x∫sec(3x)tan(3x)dx

Find $\int \sec ( 3 x ) \tan ( 3 x ) d x$