Hi

Another "show that" problem involving inverse trig. functions.

Show that

Since , I assume I can take

But what do I do with my right-side?

Kinda stuck here.

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- June 11th 2009, 02:55 AMTwigShow that arccos(...) = ...
Hi

Another "show that" problem involving inverse trig. functions.

Show that

Since , I assume I can take

But what do I do with my right-side?

Kinda stuck here. - June 11th 2009, 03:37 AMAmer
let

as you can see from the pic

Attachment 11859

since

we let

- June 11th 2009, 03:40 AMTheAbstractionist
Let Then

But since for all Hence - June 11th 2009, 05:32 AMTwig
Thanks guys, always nice with a few different approaches.

I think the drawing a triangle solution is something I need to remember. - June 11th 2009, 06:24 AMSoroban
Hello, Twig!

Quote:

Show that: .

Then: .

. . Hence: .

Then: .

. . Hence: .

Therefore: .