?

Single Variable Calculus

Free Version

Upgrade subject to access all content

Moderate

Using the Quotient Rule on a Tangent Function

SVCALC-WRFKA@

For:

$$f(x)=\frac { 2x }{ \tan { x } }$$

...find:

$$f'\left( \frac {\pi }{ 4 } \right)$$

A

$\frac { \sqrt { 2 } }{ 2 }$

B

$2+\pi$

C

$2$

D

$2-\pi$