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Solve the Equation for θ  If

Question 75

Multiple Choice

Solve the equation for θ  if Solve the equation for θ  if . Do not use a calculator. 2cos  θ + 1 = 0 ​ A) 60°; 120° B) 45°; 315° C) 120°; 240° D) 60°; 300° E) 45°; 45° . Do not use a calculator.
2cos  θ + 1 = 0
​


A) 60°; 120°
B) 45°; 315°
C) 120°; 240°
D) 60°; 300°
E) 45°; 45°

Correct Answer:

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