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Post-UTME Mathematics 2016 Objective — Question 56

Question 56 of 60 from the Post-UTME Screening (Post-UTME) Mathematics 2016 Objective paper, with the correct answer and a full explanation.

Trigonometry 6. 4 sin 4x = ?

A. 4 sin 4x cos 4x
B. 4 sin 2x cos 2x
C. 8 sin 4x cos 4x
D. 8 sin 2x cos 2xCorrect

Explanation

4sin4x = 4(2sin2xcos2x) = 8sin2xcos2x, using the double angle identity.

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