NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 49

If tan A + cot A = 2, then find the value of tan^2 A + cot^2 A. A. 4 B. 2 C. 1 D. 1/2

  1. C

  2. B

  3. D

  4. A

Show answer & explanation

Answer: (B) B

Explanation

tan A + cot A = 2 gives (tan A + cot A)² = 4 = tan²A + cot²A + 2, so tan²A + cot²A = 2.