Hi, this question is from the supplementary text .please solve it for me!!

Using Law of Sines,prove that

a(CosC-CosB)=2(b-c)Cos²(A/2) where a,b and c are the sides of the triangle and

A,B,C are the angles of the triangle.

Question

Hi, this question is from the supplementary text please solve it
for me!!
Using Law of Sines,prove that
a(CosC-CosB)=2(b-c)Cos2(A/2) where a,b and c are the
sides of the triangle and
A,B,C are the angles of the triangle

Lalit Mehra · Accepted Answer

Hi! Here is the answer to your question

Cheers!

Hi, this question is from the supplementary text .please solve it for me!! Using Law of Sines,prove that a(CosC-CosB)=2(b-c)Cos2(A/2) where a,b and c are the sides of the triangle and A,B,C are the angles of the triangle.

Hi, this question is from the supplementary text .please solve it for me!!

Using Law of Sines,prove that

a(CosC-CosB)=2(b-c)Cos²(A/2) where a,b and c are the sides of the triangle and

A,B,C are the angles of the triangle.