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Sticky Note
What is the value of 2 × sin 45° × cos 45°?
  1. 1
  2. 2
  3. 0
  4. None of these
Explanation

Using the identify 2 sin A cos A = sin 2A, so 2 sin 45° cos 45° = sin 90°.

Since sin 90° = 1, the expression equals 1.

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