ok the book quotes sin and cos of 45 degress as 1/sqrt 2, but my calculator give the answer of 2/sqrt 2

I`m convinced the book is wrong , or am I nuts?

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- April 13th 2012, 09:34 AM #1

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- April 13th 2012, 09:45 AM #2

- April 13th 2012, 12:19 PM #3

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- April 14th 2012, 02:39 PM #4

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