2019 THREE(a)

Achievement
Question
Differentiate y=4sinxy = \dfrac{4}{\sin x}.

*You do not need to simplify your answer.*
Official Answer
4sin2xcosx-4\sin^{-2}x\cos x OR 4cscxcotx-4\csc x\cot x
Grading Criteria

Achievement (u)

  • Correct derivative.

Merit (r)

-

Excellence T1

-

Excellence T2

-
Video Explanation
NCEA Level 3 Calculus Differentiation 2019 NZQA Exam - Worked Answers by infinityplusone(starts at 46:20)
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