Answer:
steps below
Step-by-step explanation:
Are you going to solve the value of A or just a proof the equation
cos 2A = cos² A - sin² A
2cos²A-cos2A-1 = 2cos²A - (cos² A - sin² A) - 1 = cos² A + sin² A - 1
2cos²A-cos2A-1 = 1 - 1 = 0
A: 90° or 270° or 450° .....
A = bh
A = 67 x 52
A = 3484
answer
B. 3484 ft^2
Answer:
6x+50
Step-by-step explanation:
we need to distribute the 5 first
5x+50+x
then
6x+50
121/121
1
one
etc
hope this helps