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#401 2021-03-19 14:29:47
- Jai Ganesh
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- Registered: 2005-06-28
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Re: Trigonometry
Hi,
Excellent!
T#220.
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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#402 2021-03-20 05:20:06
- irspow
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Re: Trigonometry
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#403 2021-03-20 15:30:20
- Jai Ganesh
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Re: Trigonometry
Hi,
Neat work!
T#221.
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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#404 2021-03-21 04:06:09
- irspow
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Re: Trigonometry
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#405 2021-03-21 15:27:09
- Jai Ganesh
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- Registered: 2005-06-28
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Re: Trigonometry
Hi,
Excellent!
T#222.
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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#406 2021-03-22 03:52:10
- irspow
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Re: Trigonometry
Last edited by irspow (2021-03-23 03:45:52)
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#407 2021-03-22 14:52:14
- Jai Ganesh
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- Registered: 2005-06-28
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Re: Trigonometry
Hi,
A minor error in your solution!
T#223.
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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#408 2021-03-23 04:19:15
- irspow
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Re: Trigonometry
I will chalk up the typo to old age, fat fingers, and smartphone 
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#409 2021-03-23 14:34:01
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 48,406
Re: Trigonometry
Hi,
Neat work!
T#224.
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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#410 2021-03-24 03:27:48
- irspow
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- Registered: 2005-11-24
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Re: Trigonometry
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#411 2021-03-24 15:45:09
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: Trigonometry
Hi,
Excellent!
T#225.
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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#412 2021-03-25 04:20:06
- irspow
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- Registered: 2005-11-24
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Re: Trigonometry
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#413 2021-03-25 16:01:40
- Jai Ganesh
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Re: Trigonometry
Hi,
I think so!
T#226.
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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#414 2021-03-26 04:16:41
- irspow
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Re: Trigonometry
In reference to 225
In my working out of x and y (x=4/5 and y=-3/5) which established an angle of -36.87 (or 323.13). These values for x and y and the angle satisfied both equations. ie
sin(-36.87)+2cos(-36.87)=1 and then 2sin(-36.87)-cos(-36.87)= -2 (and of course using 323.13 is the same)
I followed your working out and didn’t see an immediate error. The only thing that I can think of is that maybe the assumption that the root in last step is a positive 2 may be the issue. What I mean is that perhaps there was a positive and negative root and that the positive root was extraneous for reasons not immediately obvious through purely trigonomic substitutions. I am not sure, but my alternate solution still satisfied the first equation. To flip the sign to positive from what I found there has to be an angle in the first or third quadrant that would produce a positive 2. I had no luck finding that alternative angle that still satisfied the first equation.
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#415 2021-03-26 04:44:27
- irspow
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Re: Trigonometry
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#416 2021-03-26 15:21:09
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
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Re: Trigonometry
Hi,
Neat work!
T#227.
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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#417 2021-03-27 02:51:10
- irspow
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- Registered: 2005-11-24
- Posts: 1,055
Re: Trigonometry
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#418 2021-03-27 15:59:15
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: Trigonometry
Hi,
Neat work!
T#228.
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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#419 2021-03-28 05:29:58
- irspow
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- Registered: 2005-11-24
- Posts: 1,055
Re: Trigonometry
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#420 2021-03-28 15:14:25
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 48,406
Re: Trigonometry
Hi,
Excellent!
T#229.
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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#421 2021-03-29 05:28:23
- irspow
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- Registered: 2005-11-24
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Re: Trigonometry
I am at an age where I have forgotten more than I remember, but I still pretend to know it all.
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#422 2021-03-31 14:45:52
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: Trigonometry
Hi,
T#230.
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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#423 2021-04-02 17:31:14
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: Trigonometry
Hi,
T#231.
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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#424 2021-05-01 21:53:30
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: Trigonometry
Hi,
T#232.
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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#425 2021-05-09 22:07:12
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 48,406
Re: Trigonometry
Hi,
T#233.
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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