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KCET2013MathematicsInverse Trigonometric Functions

(2 ⁻¹ 1 5 + ⁻¹ 1 5 ) is euqal to

Options

  1. A1 5
  2. B-2 6 5
  3. C- 1 5
  4. D6 5

Correct answer

B. -2 6 5

Step-by-step solution

2 ⁻¹ 1 5 + ⁻¹ 1 5 = ⁻¹ 1 5 + ( ⁻¹ 1 5 + ⁻¹ 1 5 ) = ⁻¹ 1 5 + 2 ( ⁻¹ x+ ⁻¹ x= 2 , x R ) = ( 2 + ⁻¹ 1 5 )=- ( ⁻¹ 1 5 )=- ( ⁻¹ 24 5 )=- 2 6 5

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