Example 21 - Solve cos x = 1/2 - Trigonometric Functions CBSE - Examples

  1. Chapter 3 Class 11 Trigonometric Functions
  2. Serial order wise
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Example 21 Solve cos x = 1/2 Let cos x = cos y Given cos x = 1/2 From (1) and (2) cos y = 1/2 cos y = cos ๐œ‹/3 y = ๐œ‹/3 Step 2 Since cos x = cos y General Solution is x = 2nฯ€ ยฑ y where n โˆˆ Z Putting y = ๐œ‹/3 x = 2ฯ€ ยฑ ๐œ‹/3 where n โˆˆ Z

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