Class 10 Book Solution from K C Nag in Trigonometry : Concept of Measurement of Angle Question No: 22.1(3)(iv)

একটি কোণের ডিগ্রি, গ্রেড ও রেডিয়ান পরিমাপ যথাক্রমে D,G এবং R হলে প্রমান করো যে, \(\frac{D}{90}=\frac{G}{100}=\frac{2R}{\pi}\)

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