Answer:
the answer is C
Step-by-step explanation:
n = 7.25
7 < 7.25 <8
70
20x(1+150%)
28x(1+1.5)
28x2.5
( cos40° + isin40°)
To divide
= [ cos(x₁ - x₂) + isin(x₁ - x₂)
Given
= ( cos(90 - 50)° + isin(90 - 50)°
= ( cos40° + isin40° )
3(9p-5) I think that is the answer