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Post-UTME Mathematics 2016 Objective — Question 57

Question 57 of 60 from the Post-UTME Screening (Post-UTME) Mathematics 2016 Objective paper, with the correct answer and a full explanation.

Trigonometry 7. If tan A = cot B, then A + B = ?

A. 0°
B. 45°
C. 90°Correct
D. 180°

Explanation

Since cotB = tan(90°-B), tanA=tan(90°-B) gives A=90°-B, so A+B=90°.

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