

Examples
Example 2 Important
Example 3
Example 4
Example 5 Important
Example 6 Important
Example 7 Important
Example 8
Example 9 Important You are here
Example 10
Example 11 Important
Example 12
Example 13
Example 14
Example 15
Example 16 Important
Example 17 Important
Example 18
Example 19
Example 20 Deleted for CBSE Board 2022 Exams
Example 21 Deleted for CBSE Board 2022 Exams
Example 22 Important Deleted for CBSE Board 2022 Exams
Example 23 Deleted for CBSE Board 2022 Exams
Example 24 Important Deleted for CBSE Board 2022 Exams
Example 25 Important
Example 26
Example 27 Important
Example 28 Important
Example 29 Important
Examples
Last updated at Feb. 13, 2020 by Teachoo
Example 9 Find the value of cos (–1710°). cos(−1710°) = cos(1710°) = cos(1710 ×𝜋/180) = cos(19𝜋/2) = cos(9 1/2 𝜋 ) = cos(10𝜋−𝜋/2) Value of cos x repeats after an interval of 2π, Hence, ignoring 5 × (2π) i.e. 10π = cos((−𝜋)/2) = cos((−180)/2) = cos(–90°) = cos90° = 0 As cos (−x) = cos x