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Vijay Sharma

· started a discussion

· 1 Months ago

CAN SOMEONE PLEASE ELABORATE THE FORMULA USED HERE (Question: 292659.0 )

WHAT IS THIS FORMULA USED HERE CAN SOMEONE PLEASE ELABORATE

Question:

In a triangle ABC, AD is the angle bisector of ∠BAC and ∠BAD = 60º. What is the length of AD?

  

Options:
A)

b+Cbc    

B)

bcb+c    

C)

b2+c2    

D)

(b+c)2bc    

Solution:

Ans: (b)

  

Abhyut

· commented

· 1 Months ago

Area of a triangle when two sides a,b and included angle X are given - 1/2 *a*b*SinX.
Use this Area formula for triangles BAD + ADC = ABC
You will get that eqn,
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