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![[Post New]](/templates/default/images/icon_minipost_new.gif) 21 Sep 2008 19:16:28 IST
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sides of a triangle ABC are in A.P . if a<minimum{b,c} then cosA may be equal to
A)4b-3c/2b
B)3c-4b/2c
C)4c-3b/2b
D)4c-3b/2c
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21 Sep 2008 21:21:19 IST
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Use cosine formula for cosA and in place of a put a=2b-c
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