ianhendry wrote:hmm i see sqrt(1-1) 1/1 *a/a the a going back under the root gets ^2 theirfore sqrt (a^2 -1)
I'm sorry, but I don't understand what you mean...?
What did you get when you simplified (1/a)2
What did you get when you subtracted the result from 1, starting with converting the 1 = 1/1 to the common denominator?
What did you get when you split the square root of a fraction into a fraction made with two square roots, and then simplified the denominator?
Please show your steps. Thank you!