If and , which relation holds between and ?

Answer and explanation

Correct answer: C.

  1. Step 1: .
  2. Step 2: .
  3. Step 3: Taking square root: .
  4. Step 4: Thus .
Answer
.
Why not the others: adds rather than subtracts squares; drops factor of 2; and squares the right-hand side.

Practise more Geometry and Trigonometry.

Free questions with an explanation for every one, and full timed CBSE Class 10 mock tests.