Maths tragedy! Please help!!!!!!
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Maths tragedy! Please help!!!!!!

[From: ] [author: ] [Date: 12-03-10] [Hit: ]
???? WHY??......
sec inverse of ( sinx/x ) when x tends to zero.

I did this:

First i rewrote sec inverse as cos invrse and inverted sinx/x to x/sinx.

thus it became: cos inverse of ( x/sinx ) when x ttends to zero.

Then i applied the formula x/sinx =1 (when x->0)

Thus the answer is cos inverse of 1. OR 0.

But my textbook says its not Defined!!!????? WHY?????? :(

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Your answer is correct. Are you looking at the right answer in the textbook?
The answer "not defined" isn't even a valid answer for a limit. Either the limit doesn't exist or you get a number.

Either that or you read the problem wrong. What does the problem ask you to do? Are you supposed to find the limit as x approaches zero or does it ask what it equals when x is zero. The answer to the latter would be "not defined".
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