(adsbygoogle = window.adsbygoogle || []).push({}); Find

[tex]\sum_{1}^{n} \tan(a f_{n} ) [/tex]

[tex]\cos x = 1 - {x^2 \over 2!} + {x^4 \over 4!} - \cdots[/tex]

[tex]\sin\left( x \right) = x - \frac{x^3}{3!} + \frac{x^5}{5!} - \frac{x^7}{7!} + \cdots[/tex]

[tex] \tan(x) = \sin(x) / \cos(x)[/tex]

There might be equations for the summation of a series of sine functions or an equation for the summation of a series of consine functions. I don't know what they are. I have no idea how to go about deriving this.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Summation of Tan functions

**Physics Forums | Science Articles, Homework Help, Discussion**