+0  
 
0
267
2
avatar+280 

Thisis what i got, after this im taking my final at school.

Veteran  Mar 20, 2017
 #1
avatar+87334 
+2

sin (u/2)  =  sqrt [    (1 - cos (u) )  / 2 ] =   sqrt [ ( 1 - sqrt (15)/5) / 2 ] =

 

sqrt [ [ 5 - sqrt (15)] / 10 ]

 

 

 

cos (u/2)    =  sqrt [    (1 + cos (u) )  / 2 ] =   sqrt [ ( 1 + sqrt (15) / 5) / 2 ] =

 

sqrt [ [ 5 + sqrt (15)] / 10 ]

 

 

tan (u/2)   =  sin (u/2) /  cos (u/2)    =

 

sqrt [ [ 5 - sqrt (15)] / 10 ]  /  sqrt [ [ 5 + sqrt (15)] / 10 ]  =

 

sqrt  [ 5 - sqrt (15)]    /  sqrt  [ 5 + sqrt (15)]  

 

 

cool cool cool

CPhill  Mar 20, 2017
 #2
avatar+280 
0

Im having a hard time following, the text is hard to understand like that for me,

Veteran  Mar 20, 2017

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