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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 1,021

simplify :

the options are

a)

b)

c)

d)

well,i tried to simplify but was struck by getting the answer:-

pls. help

niharika

friendship is tan 90°.

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,380

hi

Just logged in. I'm working on it now.

Bob

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

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,380

OK. So at least we agree.

Just trying something else .....

Bob

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

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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 1,021

this is what i did.

but the answer doesn't match with the options.

friendship is tan 90°.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,365

Hi;

You can also use the formula that anonimnystefy showed me.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 1,021

thank you

friendship is tan 90°.

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,380

Nehushtan: Thanks for pointing out my missing square root sign. I was just getting there as I had decimal values for the four possible answers and the question when you posted.

Bob

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

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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 1,021

it was quite good, just needed more intelligent attention.

friendship is tan 90°.

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,380

hi niharika_kumar

My 'Help-me' posts do tend to suffer from gremlins . What follows may act as a warning to those who read them.

(i) Sometimes typos creep in. I may not spot them until I look at my own post later and sometimes not even then.

http://www.mathisfunforum.com/viewtopic … 51#p293051

(ii) Sometimes I fail to read the question properly and go off 'on a tangent'.

(iii) Sometimes I'm just wrong. I usually leave these errors as I don't like the idea of changing history to make myself look better. In the example above, I think I just got confused by all those square root signs. I'm trying to kid myself that I was about to spot it as I had evaluated all the possible answers in a spreadsheet and worked out which one worked (with the right number of roots).

(iv) Sometimes it takes me a while to fully get to grips with a problem. I have some that I'm still trying to answer 2 years later.

Bob

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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 1,021

I don't know what to say to that but you accept it or not ,you are great in maths(and several others to in this forum) and it is great to interact with you all.

friendship is tan 90°.

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