Question

10. Prove that
(b - a)cos C + c (cos B - cos A) = c sin( A-B/2). cosec (A+B/2)​

Answer 1

Step-by-step explanation:

formulee used

1.a=b cosc+c cosB,b=acosC+ccosA

2.a=ksinA ,b=ksinB

3.sinA-sinB=cos(A+B/2)sin(A-B/2)

4.A+B+C=π

Answer 2

heyaa

refer to the attchment