Driehoeksmeting: Verskil tussen weergawes
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Lyn 38:
== Sinreël en Cosreël==
[[Lêer:Driehoek abc.jpg|right|400px]]
In driehoek ABC geld:
Sinreël: <math>\frac{a}{sin A}\ = \frac{b}{sin B}\ = \frac{c}{sin C}</math>
Cosreël: <math>\cos A = \frac{b2 + c2 – a2}{2bc}
{{saadjie}}
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