Use the Substitution Formula to Evaluate the Integral $$\int _ { \pi / 4 } ^ { 3 \pi / 4 } ( 9 + \cot \theta ) \csc ^ { 2 } \theta d \theta$$

question 55

Multiple Choice

Use the substitution formula to evaluate the integral.
- $$\int _ { \pi / 4 } ^ { 3 \pi / 4 } ( 9 + \cot \theta ) \csc ^ { 2 } \theta d \theta$$

• A) 9
• B) 36
• C) 18
• D) -9

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