IB Math HL Trigonometry Test 1 2012 P2 Q3

IB Math HL Trigonometry Test 1 2012 P2 Q3

IB Year 6 | Grade 12

5 marks

Solve \(\cos x+\cos y=1.2\) and \(\sin x+\sin y=1.4\), where \(0<x<\pi\) and \(0<y<\pi\).[5]

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Answer:\((x,y)=(0.664,1.26)\) or \((1.26,0.664)\) (3 s.f.).

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