Use the Substitution Formula to Evaluate the Integral $$\int _ { 0 } ^ { 1 } \frac { d x } { \sqrt { 81 - x ^ { 2 } } }$$

question 73

Multiple Choice

Use the substitution formula to evaluate the integral.
- $$\int _ { 0 } ^ { 1 } \frac { d x } { \sqrt { 81 - x ^ { 2 } } }$$

• A) \(\sin ^ { - 1 } \frac { 1 } { 9 }\)
• B) \(9 \cos ^ { - 1 } \frac { 1 } { 9 }\)
• C) \(\frac { 1 } { 9 } \sin ^ { - 1 } \frac { 1 } { 9 }\)
• D) \(\cos ^ { - 1 } \frac { 1 } { 9 }\)

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