# Thread: prove

1. ## prove

If A , B and C are an angles from the triangle ABC,
Show that :
4≤csc2A + csc2B + csc2C

2. ## Re: prove

Are you familiar with Lagrange multipliers, i.e., optimization with constraint?

3. ## Re: prove

Originally Posted by MarkFL2
Are you familiar with Lagrange multipliers, i.e., optimization with constraint?
Thanks Markfl2 for replying to our thread.
Do have another method rather than Lagrange multipliers.

4. ## Re: prove

Lagrange is the quickest, easiest way I know to go with this. I was just curious if you are expected/allowed to use calculus.