Post-UTME Mathematics 2018 Objective — Question 1
Question 1 of 20 from the Post-UTME Screening (Post-UTME) Mathematics 2018 Objective paper, with the correct answer and a full explanation.
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The value of y in sin(90 degrees - y) = cos(72 degrees 31') is
- A. 17 deg 29'
- B. 72 deg 31'Correct
- C. 107 deg 29'
- D. 162 deg 31'
Explanation
sin(90-y) = cos(y) (co-function identity). So cos(y) = cos(72 deg31'), giving y = 72 deg 31'.
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