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Sin Jari

Sin jari merupakan suatu alternatif untuk menghafal nilai sinus sudut-sudut istimewa menggunakan pola khusus di jari.

Muliani
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Sin Jari

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  1. Sin Jari(Nilai sin untuksudutistimewamenggunakanjari) Berikutinicaramenghafalnilai sinus menggunakanjari: (Biasanyamenggunakantangankanan) 1. Ketahuipolasetiapselajari. 1. Ketahuiposisi start. +15˚ +15˚ + 30˚ + 30˚ 45˚+ 15˚ = 60˚ Startnyadijarikelingking= 0˚ Contoh Padapelajaranmatematikakhusunyamateritrigonometriwajibhukumnyauntukmenghafalnilai sinus, cosinusdantangendarisudut-sudutistimewa. Hanyasajatidaksemuaorangmemilikitingkatandayahafalandandayaingat yang sama. Untukitusalahsatualternatifadalahmelibatkanlebihbanyakinderabiasanyaakanlebihmemudahkanmenghafaldanbisalebihmeringankankerjaotakkarenatidakperlumenghafalangkademiangkatapicukupmenghafalpolanya. 0˚ + 30 ˚= 30˚ 45˚ 60˚ 30˚ 0˚ 90˚

  2. 1. Ketahuinilai sinus padatiapjaribesertagelangnya. Sin 120˚ = Berartibergelangpositif Contoh : 45˚ Sin 120˚ = … 60˚ 120˚ 30˚ 0 0˚ 1 90˚ 90˚ 0˚ 90˚ 180˚ 90˚ 180˚ 270˚ 360˚ 270˚ Mudah-mudahanBermanfaat !!!

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