Answer:
what is the blank for
Step-by-step explanation:
sorry I mean bank
Answer:
a = 
Step-by-step explanation:
Given
ak = v + w ( isolate a by dividing both sides by k )
a = 
It's difficult to make out, but I think the task is to expand

Write the number in polar form first:

By DeMoivre's theorem, you have

and converting back to Cartesian form, this number is equivalent to
Answer:
1. 3/5
2. 9/20
3. 1/5
4. 9/10
Step-by-step explanation: