Question

tringle ABC, <B,<C. D is the midpoint of the side BC​

Answer 1

Answer:

We know,

Using cosine rule

c

2

=b

2

+a

2

−2abcosC=b

2

+a

2

−2ab(

2

a

b

)

=b

2

+a

2

−4b

2

∴c

2

=a

2

−3b

2

⇒3b

2

=a

2

−c

2

Step-by-step explanation:

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