MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
anurag singhal Grade:
        

arg{sin8π/5+i(1+cos8π/5)} is equal to


a) 3π/10


b) 7π/10


c) 4π/5


d) 3π/5

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

arg{sin8π/5+i(1+cos8π/5)}


=arg{2sin(4π/5)cos(4π/5)+i(2cos24π/5)}


=arg[2icos(4π/5){cos(4π/5)-isin(4π/5)}]


=arg{i}+arg{cos(4π/5)-isin(4π/5)}


 =∏/2 +(-4∏/5)


 =-3∏/10

7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: Rs. 15,900
  • View Details
Get extra Rs. 3,180 off
USE CODE: Srinivas20
Get extra Rs. 466 off
USE CODE: Srinivas20

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details