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Railways PYQCBT 1 2016

RRB NTPC · Question 13

What is the value of the following expression: (Cot1º Cot2º Cot3º Cot4º Cot5º . . . . Cot90º) A. 0 B. 1 C. 2 D. 1/2

  1. B

  2. D

  3. C

  4. A

Show answer & explanation

Answer: (D) A

Explanation

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