Differentiation of trigonometric functions and differentiation rules — Question 27
Original QCE Vault practice · 2 marks
Q27 · Practice questionTechnology-freeSimple familiar2 marks
QUESTION 27 (2 marks)
Differentiate y=2sinx+cos(2x). WORKED SOLUTION
Practice marking scheme
2 marksANSWERdxdy=2cosx−2sin(2x). Worked solution
d(2sinx)/dx=2cosx and d(cos2x)/dx=−2sin2x. Differentiates 2sinx correctly. [1 mark]Differentiates cos(2x) correctly and combines terms. [1 mark]Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
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