a=4,47 b=6,4
\( \frac{a}{b} \)=\( \frac{4,47}{6,4} \)
\( \frac{b}{c} \)=\( \frac{4,47}{6,4} \)
\( \frac{6,4}{c} \)=\( \frac{4,47}{6,4} \)
c≈9,16
cos(α)=\( \frac{a}{b} \)
cos(α)=\( \frac{4,47}{6,4} \)=0,698437
cos(α)=\( \frac{b}{c} \)
cos(α)=\( \frac{4,47}{6,4} \)=0,698437
\( \frac{c}{a} \)=\( \frac{9,16}{4,47} \)≈2,05
\( \frac{c}{a} \)=\( \frac{1}{cos^2(α)} \)
2,05=\( \frac{1}{0,698437^2} \)