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BITSAT2015MathematicsTrigonometric Ratios & IdentitiesActual

If A B =n, A B =m , then the value of (m²-n² ) ² B is

Options

  1. A1+ n ²
  2. B1- n ²
  3. Cn ²
  4. D- n ²

Correct answer

B. 1- n ²

Step-by-step solution

A=n B and A=m B Squaring and adding, we get 1=n² ² B+m² ² B array ll & 1=n² (1- ² B )+m² ² B & (m²-n² ) ² B=1-n² array

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