MCQ

Share

In any triangle ABC, the simplified form of `$(cos2A)/a^2 - (cos2B)/b^2$` is ______

• A
  $a^2+b^2$
• B
  $1 /\left(a^{\wedge} 2-b^{\wedge} 2\right)^{\circ}$
• C
  $a^2-b^2$
• ✓
  $1 / a^{\wedge} 2-1 / b^{\wedge} 2^{\prime}$