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Cos x is negative and sin x is negative.Which of the following is true of...

Mathematics
WAEC 1998

Cos x is negative and sin x is negative.Which of the following is true of x?

  • A. 0o < x < 90o
  • B. 90o < x <180o
  • C. 180o < x < 270o
  • D. 270o < x <360o
  • E. -90o < x <90o
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Correct Answer: Option C
Explanation

In the 3rd quadrant, only the tan of angles are positive.

The 3rd quadrant = 180° < x < 270°

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
WAEC offline past questions - with all answers and explanations in one app - Download for free
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