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Find the Indefinite Integral tan39xdx\int \tan ^ { 3 } 9 x d x

Question 93

Multiple Choice

Find the indefinite integral. tan39xdx\int \tan ^ { 3 } 9 x d x


A) 118tan29x19lncos9x+C\frac { 1 } { 18 } \tan ^ { 2 } 9 x - \frac { 1 } { 9 } \ln | \cos 9 x | + C
B) 19lncos9x+118tan29xsec9x+C\frac { 1 } { 9 } \ln | \cos 9 x | + \frac { 1 } { 18 } \tan ^ { 2 } 9 x \sec 9 x + C
C) 19lncos9x+118tan29x+C\frac { 1 } { 9 } \ln | \cos 9 x | + \frac { 1 } { 18 } \tan ^ { 2 } 9 x + C
D) 19lncos9x118sec29x+C\frac { 1 } { 9 } \ln | \cos 9 x | - \frac { 1 } { 18 } \sec ^ { 2 } 9 x + C
E) 19lncos9x+118sec29x+C\frac { 1 } { 9 } \ln | \cos 9 x | + \frac { 1 } { 18 } \sec ^ { 2 } 9 x + C

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