Could anyone give me assistance on finding all solutions to this particular equation. cos^2x + 2 cos x + 1 = 0

A detailed step by step assistance would be lovely

Question

Could anyone give me assistance on finding all solutions to this particular equation. cos^2x + 2 cos x + 1 = 0

A detailed step by step assistance would be lovely

zehanz · Answer

Factor it first; if you look closely, you'll see the form a²+2ab+b².

anonymous · Answer

So it would be (cos + 1)(cos + 2)? It's been a while since I've factored

anonymous · Answer

go to this website for step by step how to slove this http://www.enotes.com/math/q-and-a/can-solve-equation-like-quadratic-2cos-2x-cos-x-1-212919/

anonymous · Answer

Lovely must appreciated!

anonymous · Answer

I would walk you through this problem, but on the internet as you see will very long to solve that is why I found a website with the answer worked out for you.

anonymous · Answer

toadsage did the site work for you?

mertsj · Answer

$$(\cos x +1)(\cos x +1)=0$$
$$\cos x = -1$$
$$x= \pi + 2\pi n$$