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
Bylapudi Kanakaraju Grade: 12th pass
        
IF+COS*4/A*3+SIN*4/A=1/A=B SHOW THAT COS*8/A*3+SIN*8/B*3=1/(A+B)*3
2 years ago

Answers : (1)

Latika Leekha
askIITians Faculty
165 Points
										Hello student,
I think you have missed several terms while typing your question
I am assuming the question is
If cos4x/a + sIn 4x/b = (1/a+b), then we are required to prove that
cos8x/a3 + sIn 8x/b3 = (1/a+b)3
Solution: We know that cos4x = (cos2x)2 = (1 – sin2x)2 = 1 + sin4x – 2sin2x
So, sin4x/b + cos4x/a = 1/(a+b)

242-2112_forum 15th june.png242-466_Forum 15th June (2).png
So, cos8x/a3 + sIn 8x/b3 = (1/a+b)3
2 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. 7,950 off
USE CODE: askschssp

Ask Experts

Have any Question? Ask Experts

Post Question

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