Question

Find all solutions to the equation.
cos x = - 1/2

Answer 1

x1 = pi/3 + k.2 pi
x2 =-pi/3 + k.2 p

Answer 2

If cos x = 1/2
then x = cos^(-1) (1/2)
therefore, x = 60 degrees , 300 degrees {where x is greater than or equal to 0 and lesser than or equal to 360}

or pi/3 radians, 5pi/3 radians {where x is greater than or equal to 0 and lesser than or equal to 2pi}

Answer 3

Does that make sense? To You?

Answer 4

These are my answer choices

Answer 5

hope you know that cos 60° = 1/2
so now just you need to know where cosine has negative values ,in what quadrant

hope helped

Answer 6

With My Explanation before the answer is C sometimes ppl dont understand so i try my best to explain it but if they dont get it then i give the answer