Question

2 cos x √3 = 0 for trigonometry

Answer 1

Notation does not makes sense. Did you mean \(2\cos(x) - \sqrt{3} = 0\)

Answer 2

If as presented, note that cos x = 0 when x = pi/2, 3 pi/2 etc.

Answer 3

Sorry it is 2 cos x + √3=0

Answer 4

So cos x = -sqrt(3)/2 and it looks related to a 30-60-90 triangle except for that minus sign.

x = arc cos [-sqrt(3)/2], but perhaps they want you to find the actual angle x.

Answer 5

There isn't a minus sign that's radical 3

Answer 6

?

Answer 7

Maybe they are referring to \[A \cos (Bx+c)\]?