Example 8 - Find cos (sec-1 x + cosec-1 x) - Chapter 2 NCERT - Examples

  1. Chapter 2 Class 12 Inverse Trigonometric Functions
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Example 8 - Chapter 2 Class 12 Inverse Trigonometric Functions - NCERT Find the value of cos (sec^-1 x + cosec^-1 x), |x| ≥ 1 cos (sec-1 x + cosec-1 x) (As sec-1 x + cosec-1 x = π/2) = cos ( π/2) = cos ((180 )/2) = cos 90 = 0

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