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In 3b(i) Copy and complete a diagram to show the points Q and R, and distances 20km and 15km.
In 3b(ii) Using Pythagoras theorem to calculate the distance PR, the shortest distance a ship traveled from a point P.
In 3b(iii) Using the trig ratio "sine of an angle" to calculate angle QPR to the nearest degree.
Taken from CXC CSEC Math Exam Paper 2 Question 3b May 2012.