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# Perfect calculation

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A processor has a numerical innacuracy, sin(0)=0.0000254 and things like that. My calculator just told me (sin(pi/3))^2=0.75 how come it isn''t 0.7499989984 or something? It can give perfect answers to (log_e(2+(-1+e^arctan(1))))/pi and 1-10^-0.5 etc. How? ******** A Problem Worthy of Attack Proves It''s Worth by Fighting Back

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This isn''t really something for discussion really, is it? You need an article or a book to explain it to you.

Have you tried searching the web or your college library?

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Depends on how many sig figs are used in the calculation and how many fixed decimal places you want.

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Yeah. The calculator simply calculates at higher precision than it shows to you. Maybe it gets a result

sin(pi/3)^2 = 0.750000000000000000003457465

and then just shows you 0.75

Try doing something like

(0.15^500) ^ (1/500)

and you''ll likely get 0 instead of 0.15

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