A alussovsky Member Joined May 17, 2018 Messages 34 Gender Male HSC 2019 May 18, 2018 #1 This is a question from chapter 4, 3U Cambridge yr 11. How would you do questions (i) and (ii)? Thank you in advance!

This is a question from chapter 4, 3U Cambridge yr 11. How would you do questions (i) and (ii)? Thank you in advance!

integral95 Well-Known Member Joined Dec 16, 2012 Messages 749 Gender Male HSC 2013 May 18, 2018 #2 i) Construct the centre point O. Connect that point with A and C to form Triangle AOC. OA = OC = 6 (Radii of circle) Angle AOC = 30 (angle at the centre is twice the angle at the circumference) Now simply use the cos rule to find AC. ii) One way I see is using the sine rule to find the value of one of the other sides, then use the formula to get the area. Last edited: May 18, 2018

i) Construct the centre point O. Connect that point with A and C to form Triangle AOC. OA = OC = 6 (Radii of circle) Angle AOC = 30 (angle at the centre is twice the angle at the circumference) Now simply use the cos rule to find AC. ii) One way I see is using the sine rule to find the value of one of the other sides, then use the formula to get the area.