[back]  3.16. Sine Surface 
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The Sine Surface [ 6,11 ] is represented by the following equations.
x = sin(u) 
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y = sin(v) 
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z = sin(u + v) 
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The sine surface is the counterpart to the cosine surface .
To represent the area, the two parameters u and v must have the following values (definition range).
u is an element from the number set [pi, pi] 

v is an element from the number set [pi, pi] 
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