Find the exact radian value of

My answers:

is this right?

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- March 26th 2006, 01:57 PMc_323_hNeed double checking.
Find the exact radian value of

My answers:

is this right? - March 26th 2006, 02:02 PMThePerfectHackerQuote:

Originally Posted by**c_323_h**

to get that you need,

thus, all the solutions are,

- March 26th 2006, 02:15 PMc_323_hQuote:

Originally Posted by**ThePerfectHacker**

- March 26th 2006, 03:40 PMThePerfectHackerQuote:

Originally Posted by**c_323_h**

- March 26th 2006, 03:48 PMtopsquarkQuote:

Originally Posted by**ThePerfectHacker**

Your original answer is correct, c_323_h.

-Dan - March 26th 2006, 04:20 PMThePerfectHacker
Here are the two non-coterminal pairs.

Which simplifies to,

Thus, all solutions are,

where - March 26th 2006, 04:43 PMc_323_hQuote:

Originally Posted by**ThePerfectHacker**

- March 26th 2006, 05:58 PMThePerfectHackerQuote:

Originally Posted by**c_323_h**

That means must be one of the "elements" of that set. - March 26th 2006, 06:05 PMc_323_h
wait a second. the range of arccos is since it is the inverse of cos. This means that arccos is only negative in II. so the only answer would be . is my reasoning correct? i was just thinking about the graph of arccos.

- March 27th 2006, 03:57 AMtopsquarkQuote:

Originally Posted by**c_323_h**

-Dan