Context for question 7y=2−cos3x3+sin3xThe equation of a curve is given above, for 0≤x≤π. The gradient of the curve is equal to −23 when x=a.
7(a)Differentiation Rules Tangents NormalsMedium4 marksShow that a satisfies the equation sin23a+6sin3a−3=0.WorkingTypeWriteMath0 wordsGrade answerSolutionGrading criteria
7(b)Trigonometric Identities EquationsMedium3 marksHence find the values of a for 0≤a≤π.WorkingTypeWriteMath0 wordsTypeWriteMath0 wordsGrade answerSolutionGrading criteria