Evaluate the Integral by Using a Substitution Prior to Integration $$\int \cos ( \ln x ) d x$$

question 50

Multiple Choice

Evaluate the integral by using a substitution prior to integration by parts.
- $$\int \cos ( \ln x ) d x$$

• A) \(\frac { x } { 2 } [ \cos ( \ln x ) + \sin ( \ln x ) ] + C\)
• B) \(x \cos ( \ln x ) + \sin ( \ln x ) + C\)
• C) \(\frac { x } { 2 } [ \cos ( \ln x ) - \sin ( \ln x ) ] + C\)
• D) \(x [ \cos ( \ln x ) + \sin ( \ln x ) ] + C\)

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