$$\text { Find the value of } d ^ { 2 } y / d x ^ { 2 } \text { at the point defined by the given value of } t \text {. }$$

question 120

Multiple Choice

$$\text { Find the value of } d ^ { 2 } y / d x ^ { 2 } \text { at the point defined by the given value of } t \text {. }$$
- $$x = \tan t , y = 9 \sec t , t = \frac { 3 \pi } { 4 }$$

• A) \(- \frac { 9 } { 2 }\)
• B) \(- \frac { 9 \sqrt { 2 } } { 4 }\)
• C) \(9 \sqrt { 2 }\)
• D) \(\frac { \sqrt { 2 } } { 4 }\)