## Topics/Questions discussed in this video:

NCERT Exemplar Class 11 Maths Chapter 3 Trigonometry Functions

**Example 5:** Find the value of \tan 9° – \tan 27° – \tan 63° + \tan 81°

NCERT Exemplar Class 11 Maths Chapter 3 Trigonometry Functions

**Example 5:** Find the value of \tan 9° – \tan 27° – \tan 63° + \tan 81°