Arnold K H Tan's answer to TitusLim's Secondary 3 E Maths Singapore question.

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Arnold K H Tan
Arnold K H Tan's answer
2108 answers (A Helpful Person)
1st
You can actually solve the question without calculating the angle 45.9 degrees. Just use @ and @/2 for angles BAC = angle PAR, Angle PAO = ½ x angle PAR