JAMB Mathematics 1992 Question 41

Question 41

Integration

Evaluate the integral ∫π/12π/4 2 cos 2x dx

  1. A.−½
  2. B.−1
  3. C.½
  4. D.1
Show the answer and explanation

Answer: C (½)

Explanation

The integral of 2 cos 2x is sin 2x. So the value is sin(π/2) − sin(π/6) = 1 − ½ = ½.