2025 IGCSE Additional Mathematics October/November 0606/22 Q11

2025 IGCSE Additional Mathematics October/November 0606/22 Q11

10 marks
  1. Solve the equation \(\tan^2 2x-4\tan2x=0\) for \(0^\circ\le x\le180^\circ\).[4]
  2. Solve the equation \(\operatorname{cosec}(y+1.2)=4\), where \(y\) is in radians and \(-5<y<2\).[6]

Solution:

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Answer:(a) \(x=0^\circ,38.0^\circ,90^\circ,128.0^\circ,180^\circ\) (b) \(y=-4.59,-0.947,1.69\)

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