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 AMdavellew69sin and cos 45 degress
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? - April 13th 2012, 09:45 AMProve ItRe: sin and cos 45 degress
- April 13th 2012, 12:19 PMdavellew69Re: sin and cos 45 degress
thanks, I thought I was going nuts

- April 14th 2012, 02:39 PMHallsofIvyRe: sin and cos 45 degress
Did it ever occur to you to evaluate both 1/sqrt(2) and sqrt(2)/2 on your calculator?