In following symbols are having usual meaning then which of the following reaction is correct ?

In a triangle ABC, if a=4,b=8,/_C=60^@ , then which of the following relations is (are) correct? [Note: All symbols used have usual meaning in triangle ABC.]

With symbols having their usual meanings, which one among the following is used as the standard for defining atomic mass unit?

In a series L-C-R, AC circuit assuming that symbols have their usual meanings match the following two columns.

In a series L-C-R, AC circuit assuming that symbols have their usual meanings match the following two columns.

In a triangle ABC, if a=4,b=8,/_C=60^(@), then which of the following relations is (are) correct? [Note: All symbols used have usual meaning in triangle ABC.