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#1 2006-11-14 06:12:16
- hustla7
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- Registered: 2006-11-14
- Posts: 2
sec^2x
wat is sec^2x where x=180?
many thanx!
Last edited by hustla7 (2006-11-14 06:21:25)
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#2 2006-11-14 07:32:33
- mathsyperson
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- Registered: 2005-06-22
- Posts: 4,900
Re: sec^2x
sec x is the same as 1/cos x.
cos 180 = -1, so sec² x is (1/-1)², which is 1, not -1.
Last edited by mathsyperson (2007-01-29 01:27:55)
Why did the vector cross the road?
It wanted to be normal.
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#3 2006-11-14 07:41:30
- hustla7
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- Registered: 2006-11-14
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Re: sec^2x
thanks a lot mate
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#4 2007-01-28 22:44:29
- sang
- Guest
Re: sec^2x
(1/-1)^2 = 1 not -1
#5 2007-01-29 01:29:15
- mathsyperson
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- Registered: 2005-06-22
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Re: sec^2x
...Oops. It's unlikely that hustla will see that correction after more than 2 months, so hopefully they spotted it themselves. Thanks for posting.
Why did the vector cross the road?
It wanted to be normal.
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