1.

CF is the internal bisector of angle C of Delta ABCthen CF is equal to : (i) (2ab)/(a+b) cos.(C )/(2) (ii) (a+b)/(2ab) cos.(C)/(2) (iii) (b sin A)/(sin(B+(C )/(2))) (iv) (a+c)/(2ab) cos.(C )/(2)

Answer»

(i), (II)
(i), (III)
(ii), (IV)
(iii), (iv)

ANSWER :B


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