We’ve got cuboid ABCDA’B’C’D’.

= C’AB

= C’AD

= C’AA’

Prove that:

tg + tg +tg ≤ tg tg tg

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- November 18th 2012, 12:14 AMadam23Cuboid
We’ve got cuboid ABCDA’B’C’D’.

= C’AB

= C’AD

= C’AA’

Prove that:

tg + tg +tg ≤ tg tg tg - November 18th 2012, 04:48 PMchiroRe: Cuboid
Hey adam23.

What does tg refer to? - November 19th 2012, 12:11 PMadam23Re: Cuboid
It's tg angles

- November 19th 2012, 01:08 PMtopsquarkRe: Cuboid
- November 19th 2012, 06:00 PMProve ItRe: Cuboid
I expect it means .

- November 23rd 2012, 02:34 AMadam23Re: Cuboid
Yes, this is tan.

- November 27th 2012, 09:04 AMadam23Re: Cuboid
I tried to use Inequality of arithmetic and geometric means, but nothing's good. So, have you got any idea?