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# HP 35s complex operations

12-30-2011 01:56 PM

I note that the HP 15c can calculate solutions to complex problems such as ARCSIN (2.404). My 35s produces "invalid data" for this operation. Is there any way to retrieve the correct result of 1.5708i-1.5239 ?

Thanks!

I work in RPN...perhaps ALG has a means of producing the result (I would prefer RPN!) ?

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## HP 35s complex operations

12-31-2011 01:42 PM - edited 01-01-2012 05:15 AM

Hi,

This is not a straightforward answer. the 35s can do complex functions, and a bit more than simple four function stuff.

E.g. it can do complex roots and natural logs. But this is not straightforward either, for instance the square root of -2: entering -2 , SQRT does not work, neither -2 , 0.5 , y^x. But using -2* i*0 , 0.5 , y^x does yield 0

*1.414. Also -2 , LN does not work, but -2*

**i***0 , LN does.*

**i**

Unfortunately the complex ability of the 35s pretty much stops there. However, for ASIN and ACOS and some other functions, I wrote an article for the HPCC Datafile magazine for programs for the 32s and 35s.

Article extracted for the 35s follows below.

Hope this helps,

BartdB

*01-01-2012:*

*Edit : change to lines *I039*, *I040* & *I041

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## HP 35s complex operations

01-02-2012 04:11 PM

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## HP 35s complex operations

12-14-2013 11:25 AM - edited 12-14-2013 11:46 AM

Please see my answer __here__.

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