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LCHL SEC 2019 P2 Q9

10,00

circle, radius of circle and triangles

a) cosine rule

b) sine rule or cosine rule

c) three formulas for area of triangle

d) i) area of triangle

d) ii) connection between radius of incircle in triangle and area of triangle

d) iii) calculating value of unknown

e) area of triangle, trigonometric ratio: sin and tan