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If f(x)=xtanx, find f(π4)f ( x ) = \frac { x } { \tan x } , \text { find } f ^ { \prime } \left( \frac { \pi } { 4 } \right)

Question 117

Multiple Choice

If f(x) =xtanx, find f(π4) f ( x ) = \frac { x } { \tan x } , \text { find } f ^ { \prime } \left( \frac { \pi } { 4 } \right) .


A) 2π2\frac { 2 - \pi } { 2 }

B) 1π2\frac { 1 - \pi } { 2 }
C) 1π1 - \pi
D) π2\frac { \pi } { 2 }
E) 12π1 - 2 \pi
F) 2π2 - \pi

G) 22π2 - 2 \pi

H) π- \pi

Correct Answer:

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