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Railways PYQCBT 1 2016

RRB NTPC · Question 73

If cot52° = b, tan38° = ? A. √b B. √b/2 C. – b D. b

  1. C

  2. D

  3. B

  4. A

Show answer & explanation

Answer: (B) D

Explanation

52° and 38° are complementary (52 + 38 = 90), and tan(90° − θ) = cot θ. So tan 38° = cot 52° = b.