use the ruler provided to measure the base of the parallelogram shown to the nearest 0.5 CM which measurement is the closest to
the area of the parallelogram in square centimeters 
1 answer:
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We are asked to simplify the expression .
- Combine like terms! :)
That's exactly what we need to do - combine like terms.
So, we subtract:
Which gives us:
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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.