If $f ( x ) = \frac { x } { \tan x } , \text { find } f ^ { \prime } \left( \frac { \pi } { 4 } \right)$

question 117

Multiple Choice

If $f ( x ) = \frac { x } { \tan x } , \text { find } f ^ { \prime } \left( \frac { \pi } { 4 } \right)$ .

• A) \(\frac { 2 - \pi } { 2 }\)
• B) \(\frac { 1 - \pi } { 2 }\)
• C) \(1 - \pi\)
• D) \(\frac { \pi } { 2 }\)
• E) \(1 - 2 \pi\)
• F) \(2 - \pi\)
• G) \(2 - 2 \pi\)
• H) \(- \pi\)

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