It is in the simplest form
Answer:
1) Find the Least Common Denominator (LCD)
2) Find the equivalent fractions.
3) Add or subtract the fractions and add or subtract the whole numbers.
4) Write your answer in lowest terms.
The diameter is 10 square inches
Recall the half-angle identity:
So in order to find
, we only need to know the value of
. But there are two possible values. To decide which to take, we use the given information: we know that
lies in quadrant III, which means
, so
, which places
in quadrant II. In this quadrant, the sine of angle is positive, and so
is an angle of a ray whose terminal point,
lies on the circle
. The
-coordinate is all we need to know in order to find that
. So,
