Engineering Board Exam Reviewer · Trigonometric Identities · easy

CE Board November 1992: If x = 1/2, y = 1/3, what is the value of (x+y)?

  1. 1/2
  2. 1/6
  3. 2
  4. 1

Answer

D. 1

Solution

(x+y)= x+ y/1- x y= 12+ 13/1- 12· 13=5/6/5/6=1.

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