10 times. That's the answer :)
Answer is 120.
(Sorry if photo quality is bad. The camera on my device sucks.)
Sorry for the bad handwriting.
Answer:
see explanation
Step-by-step explanation:
Using De Moivre's theorem
Given
[ 4(cos15° + isin15° ) ]³, then
= 4³ [ cos(3 × 15°) + isin(3 × 15°) ]
= 64 (cos45° + isin45° )
= 64 ( + i )
= 64 ( (1 + i) )
= 32 (1 + i)
= 32 + 32 i