Question

10. Prove that AB = BA when :
cos 0 sine
A
and B =
cos sino
sin o cos
on ]
sin cos​

Answer 1

Answer:

dont know.........................

Answer 2

Answer:

2 sin B cos B = 26°. kc cos C+2c% kb cos B, ( Using sine formule) = 2bck (b ... In any AABC, prove that a cos ;(B -C) = (b+c) sin;4