Re: really easy trig question


<matt271829-news@xxxxxxxxxxx> wrote in message
news:1125486982.505779.162180@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> . wrote:
>> Hi All,
>>
>> I used to know this, but my brain has got rusty with age.
>>
>> Why is it that sin (Pi/3) = (root 3)/2 ?
>>
>> Thanks for your help
>>
>> Michael
>
> Draw an equilateral triangle, and drop a perpendicular from the apex to
> the base. Then a bit of Pythagoras and you should be done.
>

Sorry, I must have worded my question badly.

If I do as you have said for a unit equalateral triangle I get ~0.866 ,
which ~(root 3)/2
But if I didn't know 0.866 ~(root 3)/2, how would I come up with the idea of
trying (root 3)/2 ?



.

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