Attachment 19431

Can anyone find my mistake in the above work. My book gives a different answer for the above question. The first line in the above is given by the book.

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- Oct 23rd 2010, 07:53 PMmathmike2Trig Half-Angle Formula question
Attachment 19431

Can anyone find my mistake in the above work. My book gives a different answer for the above question. The first line in the above is given by the book. - Oct 23rd 2010, 11:07 PMProve It
For starters, in the region , you should know that and .

So check your starting values of and .