Find all angles in degrees that satisfy the equation.
-cos x = -1
A) x | x = 270° + n360°
B) x | x = 90° + n360°
C) x | x = 180° + n360°
D) x | x = n180°

Name: Find all angles in degrees that satisfy the equation. -cos x = -1 A) x | x = 270° + n360° B) x | x = 90° + n360° C) x | x = 180° + n360° D) x | x = n180°
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Question

Quizplus · Accepted Answer

The cosine of an angle equals -1 only at an angle of 180°, and then every full rotation (360°) from that point.

Find All Angles in Degrees That Satisfy the Equation