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GCE Mathematics 1990 Question 44

Question 44

Trigonometry

Using the graph above, find the value of sin 270° + 2 cos 270°.

Diagram for this question
  1. A.−2
  2. B.−1
  3. C.0
  4. D.1
  5. E.2
Show the answer and explanation

Answer: B (−1)

Explanation

From the graphs, sin 270° = −1 and cos 270° = 0, so the value is −1 + 0 = −1.