Cuboid

We’ve got cuboid ABCDA’B’C’D’.
= C’AB
= C’AD
= C’AA’
Prove that:
tg + tg +tg ≤ tg tg tg

Hey adam23.

What does tg refer to?

It's tg angles

Quote:

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Originally Posted by chiro

Hey adam23.

What does tg refer to?

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Quote:

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Originally Posted by adam23

It's tg angles

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Okay. So what is a tg angle? Please give us the definition.

-Dan

I expect it means .

Yes, this is tan.

I tried to use Inequality of arithmetic and geometric means, but nothing's good. So, have you got any idea?