MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
nishant kumar agarwal Grade: Upto college level
        

if the bisector of angle A of ΔABC makes an angle Φ wid BC, then sinΦ is equal to....?

7 years ago

Answers : (1)

Jitender Singh
IIT Delhi
askIITians Faculty
158 Points
										Hello student, please find answer to your question
Let the bisector of angle A touch the side BC at D.
ADC & ADB form a a triangle
Apply sine rule,
\frac{sin\phi }{b} = \frac{sin\frac{A}{2}}{DC}
\frac{sin(180-\phi) }{c} = \frac{sin\frac{A}{2}}{BD}
\frac{sin(\phi) }{c} = \frac{sin\frac{A}{2}}{BD}
BD + DC = \frac{sin(\frac{A}{2})[b+c]}{sin(\phi )}
a = \frac{sin(\frac{A}{2})[b+c]}{sin(\phi )}
sin(\phi ) = \frac{sin(\frac{A}{2})[b+c]}{a}
2 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

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