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Old 2020-11-02, 20:28   #12
bhelmes
 
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Mar 2016

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Quote:
Originally Posted by bhelmes View Post
tan (alpha)= 11/60,
tan (alpha/2)=(61-60)/11 = 1/11

alpha=arctan (1/11)=5,194428908


sin (alpha)=0,090535746
61²*sin (alpha)=336,883511024
337 =32 mod 61 = 29 mod 61



cos (alpha)=0,995893206
61²*cos (alpha)= 3705,718621265
3705 = 45 = 16 mod 61


29² + 16² = 1 mod 61 (o.k.)


29² - (16i)² = -i²


(29i)² +16² = -1


is this o.k. ?
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