-43
-44
-45.
-43 + -45 is -88
A parallelogram is a four-sided shape with opposite sides that are both parallel and equal in length. The area of a parallelogram is the base times the height. A trapezoid is a four-sided shape with at least one set of parallel sides.
Step-by-step explanation:
Hope it helps you in your learning process.
The double angle formula for the sine is

The right hand side is exactly your expression, where 
So, rewriting the expression from right to left, we have

5 times when all 5 times are up its 7:30 which if 3/4 of a hour which is 45 and is that time4learning?