solve the equation cos x = -0.5 for 0*(deg) <x<360*(deg)?

Solve the equation cos x = -0.5 for 0° < x < 360°

Solution:
cos(60°) = 0.5
When cos(x) = -0.5
x = (180 - 60)° or x = (180 + 60)°
x = 120°, 240°

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Question No. 1:
Find the equation of line passing through A(3, 1) and B(2, 1).

No. matter what the x-coordinate is, the y-coordinate = 1
Equation of the line: y = 1

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Question No. 2
Solve the equation cos x = 0.5 for 0° < x < 360°

Solution:
cos(60°) = 0.5
When cos(x) = 0.5
x = 60° or x = (360 + 60)°
x = 60°, 300°

Refer the Link given.

Solve the equation cos x = -0.5 for 0*(deg) <x<360*(deg)?