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#1 2009-01-25 15:03:17
- MathsIsFun
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- Registered: 2005-01-21
- Posts: 7,711
Trigonometry
I have much expanded my coverage of Trigonometry.
Please check out Trigonometry Index and let me know any errors/suggestions etc.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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#2 2009-01-25 15:27:17
- careless25
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- Registered: 2008-07-24
- Posts: 560
Re: Trigonometry
could you add something like this:
i will browse through all the things later and help to make it better.
Edit: oops i never saw that!
but u can still add a chart for cos, tan, sin, sec, csc, and cot i.e. 30, 45, 60, 90
radians maybe?
Last edited by careless25 (2009-01-27 12:04:04)
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#3 2009-01-29 11:28:19
- MathsIsFun
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Re: Trigonometry
Thanks careless, I do have such a page but didn't include it in the index (I do now) See "Unit Circle"
I also have added: Interactive Triangles ... does it work nicely?
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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#4 2009-01-29 13:02:58
- mathsyperson
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- Registered: 2005-06-22
- Posts: 4,900
Re: Trigonometry
Instead of a note explaining why rounding errors make the angles' total non-constant, I'd say it'd be better to "force" the angles to all add to 180, by (say) rounding to the nearest degree for a and b and then setting c = 180-a-b.
Doing this won't make c wrong by more than a degree, so I wouldn't think the error would be visually noticable.
Why did the vector cross the road?
It wanted to be normal.
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#5 2009-01-31 20:12:49
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 46,182
Re: Trigonometry
I viewed about 7 pages from those in the Index.
Errors? I didn't find any.....
Suggestions : None! All the information and illustrations are good enough. There's no room for making them any better!!!
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#6 2009-02-01 09:49:19
- MathsIsFun
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Re: Trigonometry
Thanks Guys!
mathsy: wouldn't that be cheating ... ? 
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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#7 2009-02-01 11:42:15
- mathsyperson
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- Registered: 2005-06-22
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Re: Trigonometry
No, you'd just be using an unconventional rounding system. 
Why did the vector cross the road?
It wanted to be normal.
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#8 2009-02-01 13:29:41
- MathsIsFun
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Re: Trigonometry
Good laugh! 
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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#9 2009-02-05 03:47:10
- Devantè
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- Registered: 2006-07-14
- Posts: 6,400
Re: Trigonometry
Very nice, MathsIsFun... you never cease to amaze me!
If only Maths Is Fun existed many years ago when I began learning about trigonometry. The way you explain things with such simplicity would have been so helpful. 
Last edited by Devantè (2009-02-05 03:47:25)
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#10 2009-02-05 10:15:48
- MathsIsFun
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- Registered: 2005-01-21
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Re: Trigonometry
Thank You! What a nice compliment
I cannot take all the credit ... some of the pages were co-authored by a maths teacher called Les Gates.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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