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Leabhar Iomlán - Cogg

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Leabhar Iomlán - Cogg

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Sampla 2Scríobh 1 √ __3 i san fhoirm pholach agus uaidh sin faigh luach (1 √ __3 i) 9 .x iy 1 √ __3 iModal r √ _______x 2 y 2 √ _________1 2 ( √ 3 ) 2 2Argóint tan y 1 __ ___ √__ 3tan1x 1 r__ 3 z 1 √ __3 i 2 __(cos 3 i sin __ 3 ) 2 9 z 9 (1 √ __3 i) 9 2 9 __(cos 3 i sin __ 3 ) 9 2 9 ___(cos 9 3 i sin ___ 9 3) 2 9 (cos 3 i sin 3) 2 9 (1 i 0)Im1 3iReCleachtadh 3.91. Úsáid teoirim de Moivre chun gach ceann díobh seo a leanas a shimpliú, agus sloinn dofhreagraí san fhoirm a bi:(i) __(cos ( 8 ) i sin __( 8 )) 4 (ii) __(cos ( 6 ) i sin __( 6 )) 7(iii) ___(cos 12 i sin ___ 12) 8 (iv) ___(cos 2 3 i sin ___ 2 3) 3(v) __(cos 4 i sin __ 4 ) 6 (vi) ___(cos 2 5 i sin ___ 2 5) 10(vii) ____(cos 18 i sin ____ 18 ) 9 (viii) __(cos 6 i sin __ 6 ) 32. Má tá z √ __2 __(cos 3 i sin __ 3 ) , sloinn z4 san fhoirm a bi.3. Má tá z 3 ___(cos 10 i sin ___ 10) , sloinn z5 san fhoirm a bi.4. Sloinn (i) __(cos 3 i sin __ 3 ) 2 (ii) ___(cos 2 3 i sin ___ 2 3) 4 san fhoirm cos i sin .Uaidh sin sloinn __(cos 3 i sin __ 3 ) 2 ___(cos 2 3 i sin ___ 2 3) 4 san fhoirm a bi.125

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