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If A,B,C be the angles of a triangles, t...

If A,B,C be the angles of a triangles, then which of the following hold good?

A

`cot A cot B cot C le 1/(3sqrt(3))`

B

`"cot"A/2"cot"B/2"cot"C/2ge3sqrt((3))`

C

`cosA+cosB+cosClt3//2`

D

`sin(A//2)sin(B//2)sin(C//2)le1//8`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
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