Topics/Questions discussed in this video:
00:21:17 Meaning and origin of Word Trigonometry
00:24:47 Basics of Angles: Positive angles, negative angles, vertex with animations
00:34:57 Measuring an angle
00:36:07 Basics of Degree measure, minutes and seconds
00:40:57 Basics of Radian measure with animation
00:47:57 Relation between degree measure and radian measure
01:02:47 NCERT Exercise 3.1 Question 1 (Degree to radian conversion)
Find the radian measures corresponding to the following degree measures:
(i) 25°
(ii) – 47°30′
(iii) 240°
(iv) 520°