# Math Help - algebraically independent

1. ## algebraically independent

Hello.... I need to prove the following set is algebraically independent... I don´t have no idea how to do it. Please help me!!

${cos(x), cos(\sqrt{2} x), cos(\sqrt{3} x)}$

regards!

2. ## Re: algebraically independent

Algebraically independent over which field ?

3. ## Re: algebraically independent

Over $\mathbb{R}$ I guess. My worksheet doesn´t say it