Answer:
Part A= 0.5
Step-by-step explanation:
1x1=1
1x2=2
2x3=6
6x4=24
24x5=120
120x6=720
720x7=5040
the answer is 720 and 5040
A
Using the cosine ratio in the right triangle
cosA = = = , thus
A = ( ) ≈ 48° → A