# Exercise 3.1 Chapter 3 Trigonometric Functions Class 11 Maths

## 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°

## Agam Sir

Teacher

Ashish Kumar a.k.a Agam Sir has vast experience of 12+ years of teaching Mathematics and Physics. He has skills (academic and vocational) that go with working alongside people, especially young people, their parent(s) and the institutes that works with him. He always seek to be an agent of positive change and progression, a mentor/ trainer/ educator for learners/students, seeing that their needs are ideally met.