Answer:
Polygon, quadrilateral, convex, and equilateral.
Step-by-step explanation:
The answer would be true.
Since 10 equals y that means that 60=6y is true because 6x10 is 60.
Please see attached picture for full solution.
-cos(2A)
We know that (a+b) (a-b) = a^2-b^2
So it means we can simplify to sin^2(A)-cos^2(A) and we know cos^2(A) - sin^2(A) = cos(2A) but we will just multiply by -1 and we get - cos(2A)
