Uttrykk
Posted: 21/12-2009 14:12
Hei!
Hvordan blir denne:
[tex]-cos(\frac{9 \pi}{5})-cos(\frac{\pi}{5})[/tex]
lik denne:
[tex]-2cos(\frac{\pi}{5})[/tex]
?

Hvordan blir denne:
[tex]-cos(\frac{9 \pi}{5})-cos(\frac{\pi}{5})[/tex]
lik denne:
[tex]-2cos(\frac{\pi}{5})[/tex]
?