# Applications of Calculus: Derivatives in String Art

*String art works because the strings are tangent lines to a curve.*

*This post is part of the series Connecting Calculus to the Real World.*

String art involves creating curves, using only straight lines. The reason it works is because the lines “slope” into each other, becoming tangent lines to the curve. For example, the lines above are the tangent lines of the circle, where the slope of the line matches the derivative of the circle at each point.

Next, tangent lines to an exponential function:

A quadratic function:

A cubic:

And finally, a sine wave:

*Image credits: Math Images - The Math Forum @ Drexel*

http://mathforum.org/mathimages/index.php/String_Art_Calculus

*This post is part of the series Connecting Calculus to the Real World.*