besania
besania
12-06-2016
Mathematics
contestada
Find CosB, TanB, SinB.
Respuesta :
caylus
caylus
12-06-2016
Hello,
Theorem of Al'Kashi says:
12²=13²+5²-2*13*5*cos b
==>cos b=5/13
sin b= √(1-(5/13)²)=12/13
tan b=(12/13)/(5/13)=12/5
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