Answer:
-4 and d
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Answer:
d. −4−8 and −4+(−8)
Step-by-step explanation:
+ - is equivalent to -
Circle<span> is the locus of points equidistant from a given point, the center of the </span>circle<span>. The common distance from the center of the </span>circle<span> to its points is called radius. Thus a </span>circle<span> is completely </span>defined<span> by its center (O) and radius (R): C(O, R) = O(R) = {x: dist(O, x) = R}.
Easier explanation: </span><span>A </span>circle<span> is a plane figure contained by one line such that all the straight lines falling upon it from one point among those lying within the figure are equal to one another.</span>
By De Moivre's theorem,
We can stop here ...
# # #
... but we can also express these trig ratios in terms of square roots. Let 
and let 
. Then recall that
On the left, 
so that
Since 
, we're left with
because we know to expect 
. Then from the Pythagorean identity, and knowing to expect 
, we get
Both 
and 
are 
-periodic, so that
and
so that the answer we left in trigonometric form above is equal to
