Priklad z elektrotechniky

Potreboval by som pomoct s nasledovynm prikladom.
Rk a Zk neviem vypocitat.

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Rk=Z*cos(uhla)=0,6*0,2=0,12
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Xk=Z*sin(uhla) vieme ze cos(uhla)=0,2 ...teda uhol=arccos(0,2)=78,46304097 Xk=Z*sin(arccos(uhol))=0,6*sin(arccos(0,2))=0,6*sin(78,463)=0,6*0,9797958971=0,5878775383=0,588