Trig identiteite

Trig identiteite

by Dario van den Berg -
Number of replies: 3


Kan jy my dalk help met die som, dit maak glad nie vir my sin nie.

In reply to Dario van den Berg

Re: Trig identiteite

by Marna Zuhlsdorff -
Hi Dario
Jissie, dis wilde voodoo magic wat daar gebeur het, (",)
Hier is 'n video wat dit verduidelik, want daar is BAIE stappe wat hier uitgelaat is en dis nogals complicated om die net met pen op papier te verduidelik.
Hierdie som, dink ek, is te moeilik vir skool, en ek glo baie min mense sou dit eerste rondte self kan regkry.
MAAR omdat jy nou gesien het hoe dit werk, behoort jy 'n volgende soortgelyke som te herken en te kan doen.

Laat weet asb as daar enige iets is wat nog onduidelik is?

Marna

table row cell 4 cos 36 degree equals fraction numerator 1 over denominator sin 18 degree end fraction end cell blank blank row cell L K equals 4 cos 36 degree end cell blank blank row cell equals 4 cos 2 open parentheses 18 degree close parentheses end cell blank cell laat space straight A equals 18 degree end cell row cell equals 4 cos 2 A end cell blank cell Maal space nou space met space 1 space of space open parentheses fraction numerator sin 2 A over denominator sin 2 A end fraction close parentheses end cell row cell equals fraction numerator 4 cos 2 A over denominator 1 end fraction cross times fraction numerator sin 2 A over denominator sin 2 A end fraction end cell blank blank row cell equals fraction numerator 4 cos 2 A sin 2 A over denominator sin 2 A end fraction end cell blank blank row cell equals fraction numerator 4 cos 2 A sin 2 A over denominator 2 sin A cos A end fraction end cell blank cell want space sin 2 A equals 2 sin A cos A end cell row cell equals fraction numerator 2 sin 4 A over denominator 2 sin A cos A end fraction end cell blank cell want space sin 4 A equals sin 2 open parentheses 2 A close parentheses equals 2 sin 2 A cos 2 A end cell row cell equals fraction numerator sin 4 A over denominator sin A cos A end fraction end cell blank blank row cell equals fraction numerator sin open parentheses 5 A minus A close parentheses over denominator sin A cos A end fraction end cell blank blank row cell equals fraction numerator sin 5 A cos A minus cos 5 A sin A over denominator sin A cos A end fraction end cell blank cell want space sin open parentheses A minus B close parentheses equals sin A cos B minus cos A sin B end cell row cell equals fraction numerator sin 5 A cos A over denominator sin A cos A end fraction minus fraction numerator cos 5 A sin A over denominator sin A cos A end fraction end cell blank blank row cell equals fraction numerator sin 5 A over denominator sin A end fraction minus fraction numerator cos 5 A over denominator cos A end fraction end cell blank cell maarA equals 18 degree end cell row cell equals fraction numerator sin 5 open parentheses 18 degree close parentheses over denominator sin open parentheses 18 degree close parentheses end fraction minus fraction numerator cos 5 open parentheses 18 degree close parentheses over denominator cos open parentheses 18 degree close parentheses end fraction end cell blank blank row cell equals fraction numerator sin 90 degree over denominator sin 18 degree end fraction minus fraction numerator cos 90 degree over denominator cos 18 degree end fraction end cell blank blank row cell equals fraction numerator 1 over denominator sin 18 degree end fraction minus fraction numerator 0 over denominator cos 18 degree end fraction end cell blank blank row cell equals fraction numerator 1 over denominator sin 18 degree end fraction end cell blank blank row cell equals R K end cell blank blank end table