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June 3rd, 2011, 02:37 AM   #1
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find the largest possible domain for the function f

f:x

square root of pi/4-arcos x

sorry if i could not write hope you understand the function
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June 3rd, 2011, 03:23 AM   #2
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Re: find the largest possible domain for the function f

Use parentheses! is the problem (sqrt(pi))/(4- arccos(x)) or is it sqrt( pi/(4- arccos(x))? Those are very different functions with different domains.
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June 3rd, 2011, 03:39 AM   #3
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Re: find the largest possible domain for the function f

sqrt root of this ((pi/4)-arctang X)
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June 3rd, 2011, 03:40 AM   #4
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Re: find the largest possible domain for the function f

sorry...arccos of x
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June 3rd, 2011, 08:55 AM   #5
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Re: find the largest possible domain for the function f

Hi,

For plain vanilla arcos() the domain runs from -1 to 1, while the range goes from 0 to pi.
When you draw of graph of arcos, you will find the the maximal domain for the composite
function runs from x = 1 / sqrt(2) to x = 1.

The reason that the rest is not available is that what goes under the root must be non-negative.


Bye now,
Jan
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