Answer:
If two sides of a parallelogram are represented by the vectors, then the lengths of the diagonals of the parallelogram by the parallelogram law are |→d1| and |→d2|.
The mathematical representation for the length of the diagonals is
|→d1| = | →u + → v|
|→d1| = | →u - → v|
Answer:
It is given that : 
As we have to find the Domain of
.
-1 ≤ sin x ≤1

So it is defined for x lying between
.
As meaning of Domain is those values of x for which any function f(x) is defined.
I assume you’re solving for both X and Y
9) is X= -4, Y = 6
11) is X = -2, Y = 0
I can’t read all of 13.
I hope that helps.