Engineering Board Exam Reviewer · Trigonometric Identities · hard

ECE Board April 1991: Evaluate the following: 0°+ 1°+ 2°+·s+ 89°+ 90°/ 0°+ 1°+ 2°+·s+ 89°+ 90°

  1. 1
  2. 0
  3. 45.5
  4. 10

Answer

A. 1

Solution

Since k°= (90°-k°), the numerator and denominator are sums of the same set of values, just reordered, so the ratio is 1.

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