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**jacks****Member**- Registered: 2012-11-21
- Posts: 132

If

Then isOffline

**thickhead****Member**- Registered: 2016-04-16
- Posts: 1,086

**{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha{Gods rejoice at those places where ladies are respected.}**

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**jacks****Member**- Registered: 2012-11-21
- Posts: 132

Yes thickhead right answer, Would you like to explain me.

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**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,168

hi jacks,

Yes, I got that value to, just by calculation in Excel. But I guess you want an analysis of how to get this by algebra etc. I've been working on this, on and off, for two days and haven't got a method yet. My first attempt was to try and simplify the trig. using various trig. identities. Just went round in circles with that. Then I made a diagram with a 14 point polygon inscribed in a circle, and tried to find a method using the distances in right angled triangles plus similar triangles, angles in semi circle etc. I think that is the way to go with this, but a solution still alludes me. If I still cannot get anywhere by the end of today, I'll post my diagram. Maybe someone else can spot what I'm missing.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**thickhead****Member**- Registered: 2016-04-16
- Posts: 1,086

*Last edited by thickhead (2016-08-07 22:10:27)*

**{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha{Gods rejoice at those places where ladies are respected.}**

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**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,168

hi thickhead,

Wow! Excellent proof. I would never have thought of that. Have a gold medal:

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**thickhead****Member**- Registered: 2016-04-16
- Posts: 1,086

Thank you ,bob bundy.

**{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha{Gods rejoice at those places where ladies are respected.}**

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**jacks****Member**- Registered: 2012-11-21
- Posts: 132

Thanks thickhead nice solution using complex number

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