Are  you asking for
   (^&.j. -: sin j. -@cos) 0.5 * i.4
1

?

Thanks,

-- 
Raul

On Wed, Sep 11, 2013 at 2:23 PM, km <[email protected]> wrote:
> How would you handle
>
>     (^&.j. -: sin - i * cos) 0.5 * i.4
>  1
>
> ?
>
> Sent from my iPad
>
>
> On Sep 11, 2013, at 12:34 PM, Roger Hui <[email protected]> wrote:
>
>> I prefer the following formulation:
>>
>>   (^&j. -: cos j. sin) 0.5*i.4
>> 1
>>
>> j. is one of those masterstrokes that separate genius from mere mortals.
>>
>>
>>
>> On Wed, Sep 11, 2013 at 10:18 AM, km <[email protected]> wrote:
>>
>>>    sin =: 1&o.
>>>    cos =: 2&o.
>>>    i =: 0j1
>>>    (^&j. -: cos + i * sin) 0.5*i.4
>>> 1
>>>
>>> Kip
>>>
>>> Sent from my iPad
>>>
>>>
>>> On Sep 11, 2013, at 11:42 AM, Raul Miller <[email protected]> wrote:
>>>
>>>>  ^&j. ..- 0.5*i.4
>>>> 1 0.877583 0.540302 0.0707372
>>>>  2 o. 0.5*i.4
>>>> 1 0.877583 0.540302 0.0707372
>>>>  1 o. 0.5*i.4
>>>> 0 0.479426 0.841471 0.997495
>>>>  ^&.j. .:- 0.5*i.4
>>>> 0 0.479426 0.841471 0.997495
>>>>
>>>> --
>>>> Raul
>>>> ----------------------------------------------------------------------
>>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>> ----------------------------------------------------------------------
>>> For information about J forums see http://www.jsoftware.com/forums.htm
>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
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