Question

If A, Band c are interior angle of a triangle ABC, then show that sin (B+C/2)=cos(A/2)? From which book did u get this question

Answer 1

Answer:

Step-by-step explanation:

If A, Band c are interior angle of a triangle ABC, then show that sin (B+C/2)=cos(A/2)? From which book did u get this question

daa

Answer 2

it is an NCERT question