CBSE Class XI - chap. I-3. Trigonometric Functions - Learning Companion

3. Trigonometric Functions

Positive and negative angles. Measuring angles in radians and in degrees and conversion of one into other.

Definition of trigonometric functions with the help of unit circle. Truth of the sin2x+cos2x=1, for all x.  Signs of trigonometric functions. Domain and range of trignometric functions and their graphs. Expressing sin (x±y) and cos (x±y) in terms of sinx, siny, cosx & cosy and their simple application. Deducing identities like the following:

Identities related to sin 2x, cos 2x, tan 2x, sin 3x, cos 3x and tan 3x. General solution of trigonometric equations of the type sin y = sin a, cos y = cos a and tan y = tan a.


Maths Trigonometry part 1 (Basic Concepts, Why Trigonometry) CBSE class 11 Mathematics XI
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Maths Trigonometry part 2 (Degree Measure) CBSE class 11 Mathematics XI
https://www.youtube.com/watch?v=1FijJ6tuqW4

Maths Trigonometry part 3 (Radian Measure) CBSE class 11 Mathematics XI
https://www.youtube.com/watch?v=Bleq2RyPFUE