© examsiri.com
Question : 68 of 160
Marks:
+1,
-0
Solution:
The value of the given problem is calculated as
=[‌‌| cos‌‌+isin‌‌ |
| cos‌‌−isin‌‌ |
]72 Solve further
=[‌‌| (cos‌‌+isin‌‌)2 |
| (cos2‌‌+isin2‌‌) |
]72 =cos‌6‌π+isin6π =1
© examsiri.com
Go to Question: