The answer is 300 divided by 20 which you would get 15.
7π/12 lies in the second quadrant, so we expect cos(7π/12) to be negative.
Recall that

which tells us

Now,

and so

False.
Let <em>x</em> = -1 and <em>y</em> = 1. Then <em>x</em> + <em>y</em> = 0, so that
|<em>x</em> + <em>y</em>| = |0| = 0
but
|<em>x</em>| = |-1| = 1
|<em>y</em>| = |1| = 1
|<em>x</em>| + |<em>y</em>| = 1 + 1 = 2
10.5 is the answer. 7x12 then divide by 8