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
Grade:
        
If cos (α+β) = 4/5 and sin (α-β) = 5/13
Then tan 2α =?
11 months ago

Answers : (4)

Deepak Kumar Shringi
askIITians Faculty
4384 Points
							562-2255_Capture.PNG
						
11 months ago
Shubh Bhinde
8 Points
							
Cos(α+β)=4/5, Tan(α+β)=3/4
Sin(α-β)=5/13, Tan(α-β)=5/12
Tan(2α)= tan[(α+β)+(α-β)]
              =[tan(α+β)+tan(α-β)]/1-tan(α+β)tan(α-β)
              =(3/4 + 5/12)/1-(3/4)(5/12)
              =[(36+20)/48]/[(48-15)/48]
              =56/33
11 months ago
Deepak Kumar Shringi
askIITians Faculty
4384 Points
							

by mistake i have taken tan alpha+beta as ¾ but the method is same

11 months ago
na batau
18 Points
							
 
Cos(α+β)=4/5, Tan(α+β)=3/4
Sin(α-β)=5/13, Tan(α-β)=5/12
Tan(2α)= tan[(α+β)+(α-β)]
              =[tan(α+β)+tan(α-β)]/1-tan(α+β)tan(α-β)
              =(3/4 + 5/12)/1-(3/4)(5/12)
              =[(36+20)/48]/[(48-15)/48]
              =56/33
11 months ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 31 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

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