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Dr Shwe Kyaw Daw Myint Zu Dr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint Zu
Dr Shwe Kyaw Daw Myint Zu Dr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint Zu
Dr Shwe Kyaw Daw Myint Zu Dr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint Zu
Dr Shwe Kyaw Daw Myint Zu Dr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint ZuDr Shwe Kyaw Daw Myint Zu
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Trigonometry Textbook

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$\def\D{\displaystyle}\def\cosec{\mbox{cosec }}$ ​ေထာင္​့မွန္​ တရိဂံ $\D ABC$ တြင္​ $\D C$ သည္​ ​ေထာင္​့မွန္​ျဖစ္​ၿပီး ​ေထာင္​့ $\D A$ ၏ တန္​ဘိုးသည္​ $\theta$ ျဖစ္​ပါ​ေစ။ $AB$ ကို ​ hypotenuse, ​(ေထာင္​့မွန္​ခံအနား) $AC$ ကို adjacent, (နီးစပ္​အနား ) $BC$ ကို opposite (မ်က္​ဆိုင္​အနား) ဟု အသီးသီး​ေခၚပါ။ ​ေထာင္​့ $\theta$ အတြက္​ trigonometric ratio မ်ားကို ​ေအာက္​ပါ အတိုင္​း သတ္​မွတ္​ပါသည္​။ $\D \begin{array}{|lrcl|}\hline \mbox{Sin of }\theta:&\sin\theta&=&\frac{BC}{AC}\\ \mbox{Cosin of }\theta:&\cos\theta&=&\frac{AB}{AC}\\ \mbox{Tangent of }\theta:&\tan\theta&=&\frac{BC}{AB}\\ \mbox{Cotangent of }\theta:&\cot\theta&=&\frac{AB}{BC}\\ \mbox{Secant of }\theta:&\sec\theta&=&\frac{AC}{AB}\\ \mbox{Cosecant of }\theta:&\cosec\theta&=&\frac{AC}{BC}\\ \hline \end{array} $ အထက္​​ေဖာ္​ျပပါ အခ်ိဳး မ်ားကို six trigonometric ratios (ႀထိိဂို နို​ေမႀထီ ဆိုင္​ရာ အခ်ိဳး  ၆ မ်ိဳး ) ဟု​ေခၚပါသည္​။
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