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COMEDK2012MathematicsInverse Trigonometric Functions

[2 ⁻¹ (2 ⁻¹ 1 2 ) ] is equal to

Options

  1. A3 7 8
  2. B5 7 8
  3. C5 7 2
  4. D3 7 2

Correct answer

A. 3 7 8

Step-by-step solution

= [2 ⁻¹ ( ⁻¹ 1 1- 1 4 ) ]= [2 ⁻¹ ( ⁻¹ 4 3 3 ) ]= [2 ⁻¹ 3 4 4 ]= 20 [ . where, = 3 4 and . = ⁻¹ 3 4 ] =2 =2 7 4 , 3 4 = 3 7 8

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