Which of the following are ordered pairs for the equation y = -4x + 5? (0,5) (1,1) (-1,9) (0,5) (-1,-1) (-1,-9) (0,5) (1,-1) (-1
1 answer:
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The basic angle for 1/2 is 60°, and cosines are negative in the first and third quadrant.
So, you take 180° - 60° = 120° to get the angle in the first quadrant, and 180° + 60° = 240° to get the angle in the third quadrant.
Since only 120° is an option, the answer is B.