Post-UTME Mathematics 2016 Objective — Question 51
Question 51 of 60 from the Post-UTME Screening (Post-UTME) Mathematics 2016 Objective paper, with the correct answer and a full explanation.
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Trigonometry 1. If sin x = 3/4, then cos x = ?
- A. 2/3
- B. √3/2
- C. √7/4Correct
- D. 1/2
Explanation
cos²x = 1-sin²x = 1-9/16 = 7/16, so cosx = √7/4.
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