Answer:
0.069
Step-by-step explanation:
6.9 ×10^-2
69/1000
0.069
The answer is -148≤ F≤ -103!
nice drawing
(altho I think this is for other subject)
Answer:
3/2
Step-by-step explanation:
sin(3π/4 - β) = sin(3π/4)cosβ - cos(3π/4)sinπ =

Use 
so

It has already given you the answer.