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Railways PYQCBT 1 2020

RRB NTPC · Question 51

Value of cos 1° cos 2° cos 3° ........cos 179° is:

  1. 0

  2. 1

  3. \(\frac{1}{2}\)

  4. -1

Show answer & explanation

Answer: (A) 0

Explanation

The product includes cos 90° = 0, so the whole product is 0.