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

question 93

Multiple Choice

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

• A) \(\frac { 1 } { 18 } \tan ^ { 2 } 9 x - \frac { 1 } { 9 } \ln | \cos 9 x | + C\)
• B) \(\frac { 1 } { 9 } \ln | \cos 9 x | + \frac { 1 } { 18 } \tan ^ { 2 } 9 x \sec 9 x + C\)
• C) \(\frac { 1 } { 9 } \ln | \cos 9 x | + \frac { 1 } { 18 } \tan ^ { 2 } 9 x + C\)
• D) \(\frac { 1 } { 9 } \ln | \cos 9 x | - \frac { 1 } { 18 } \sec ^ { 2 } 9 x + C\)
• E) \(\frac { 1 } { 9 } \ln | \cos 9 x | + \frac { 1 } { 18 } \sec ^ { 2 } 9 x + C\)

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