Edexcel Mathematics June 2018 · Paper 1 · Question 3 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

June 2018 · Paper 1 · Question 3 · 4 marks

3. Oθ r cm BA r cm Figure 1 Figure 1 shows a sector AOB of a circle with centre O and radius r cm. The angle AOB is θ radians. The area of the sector AOB is 11 cm2 Given that the perimeter of the sector is 4 times the length of the arc AB , find the exact value of r. (4) 7

Lesson: Definitions of Sine, Cosine and Tangent and Exact Values