On the coordinate plan, what is the distance between the points (−3, −7) and (−9, −7)?
2 answers:
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Since the area of a circle is π
, and our radius is 9 we know the total area to be 254.469, and the ratio of sector area to total area is 169.56/254.469 = .6663. There are 360 degrees in a circle, so: 
≈ 240°
240 degrees
240 degrees
Using the unit circle, the coordinates of 3π/4 is :
Note that tangent function can be solved using the formula y/x
where x and y are the coordinates of the angle.
This will be :
The answer is -1
