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

RRB NTPC · Question 15

If A + B = 90° and cos B = 1/3; then the value of sin A is: A. 1/2 B. 1/4 C. 1/3 D. 2/3

  1. C

  2. B

  3. D

  4. A

Show answer & explanation

Answer: (A) C

Explanation

Since A + B = 90°, A = 90° − B, so sin A = sin(90° − B) = cos B = 1/3.