### Home > APCALC > Chapter 5 > Lesson 5.4.1 > Problem5-145

5-145.

Write the equation of the line tangent to $y = \operatorname{cot}(2x)$ at $x=\frac { \pi } { 3 }$.

Use point-slope form of the line.

$\frac { \text { The Equation of a Line } } { \text { The Equation of a Line } }$

$\text{Find the point using the original function at }x=\frac{\pi }{3}.$

Find the slope using the derivative at the same point.