COSINE LAW
1
'COS
2
"S=0dAø": ?>G: 
3
0dG}G0: 
4
 û(N2+O2-2NOcMø): 
5
 G1: 
6
L0: 
7
c1((N2+O2-M2)ö2NO): 
8
 L1

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