The actual problem is: prove that

My problem is: how does equal x??

I understand how but not the rational inverse, why is it so???

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- Jul 10th 2012, 09:37 AMGreymalkinInverse Trig Identity
The actual problem is: prove that

My problem is: how does equal x??

I understand how but not the rational inverse, why is it so??? - Jul 10th 2012, 05:36 PMemakarovRe: Inverse Trig Identity
The idea is that if , then . We have , so is indeed .

One has to take care of various subtleties such as rather than and only for . - Jul 10th 2012, 07:32 PMSorobanRe: Inverse Trig Identity
Hello, Greymalkin!

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