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Järgmises tabelis on tuntumate nurkade väärtused kraadimõõdus jaradiaanmõõdus.α (kraadides) 0° 30° 45° 60° 90° 180° 270° 360°x (radiaanides) 0 <strong>π</strong> <strong>π</strong> <strong>π</strong> <strong>π</strong> <strong>π</strong> 3<strong>π</strong> 2<strong>π</strong>6 4 3 22<strong>π</strong> <strong>π</strong> 2<strong>π</strong>Näiteks 120° = 90 ° +30 ° = + = rad ,2 6 3<strong>π</strong> <strong>π</strong> 5<strong>π</strong>150° = 90 ° +60 ° = + = rad ,2 3 6<strong>π</strong> 7<strong>π</strong>210° = 180 ° +30 ° = <strong>π</strong> + = rad ,6 6<strong>π</strong> 4<strong>π</strong>240° = 180 ° +60 ° = <strong>π</strong> + = rad ,3 3<strong>π</strong> 5<strong>π</strong>300° = 360° − 60 ° =2 <strong>π</strong> − = rad ,3 3<strong>π</strong> 11<strong>π</strong>330° = 360° − 30 ° =2 <strong>π</strong> − = rad .6 64.2 Teravnurga trigonomeetrilised funktsioonidTäisnurkse kolmnurga teravnurkade trigonomeetrilised funktsioonid onjärgmised.αcbβaTeravnurga siinus =vastaskaatet a b; sin α = , sin β =hüpotenuus c cTeravnurga koosinus =lähiskaatet b a; cos α = , cos β =hüpotenuus c cTeravnurga tangens =vastaskaatet a b; tan α = , tan β =lähiskaatet b aTeravnurga kootangens =lähiskaatet b a; cot α = , cot β =vastaskaatet a bα + β = 90ehk<strong>π</strong>α + β = .2Näiteks kui täisnurkses kolmnurgas nurk α = 40°, siis nurk β = 90 − 40° = 50°.52

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