Show that if A ⊂ B , then C - B ⊂ C - A

Show that A sub B then C- B sub C- A

Show that: sin A + sin B +sin C - sin(A+B+C)=4 sin ((A+B)/2)sin ((B+C)/2)sin ((C+A)/2)

If a, b, c are in A.P., then show that (i) b + c – a, c + a – b, a + b – c are in A.P.

Show that :A sube B rArr A-C sube B-C

Show that: sin A sin(B-C)+sin B sin(C-A)+sin C sin(A-B)=0

Let A, B and C be the sets such that A uu B=A uu C and A nn B = A nn C. show that B=C

Let A,B and C be the sets such that A uu B=A uu C and A nn B=A nn C .Show that B=C

Show that A nn B=A nn C need not imply B=C

Show that: a Sin (B-C) + b Sin (C-A) + c Sin (A-B) = 0

Show that the vectors -> a , -> b and -> c coplanar if -> a+ -> b ,"" -> b+ -> c and -> c+ -> a are coplanar