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3 marksSolving Simple Trigonometric Equations

CSEC Additional Mathematics · May/June 2009 · Paper 2 · Question 11(b)

Given that 0 ≤ z ≤ 3 radians.

Find, correct to 2 decimal places, all the values of z for which sin(2z + 1) = 0.9.

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Other parts of this question

  1. 11(a)(i)Find all the angles between 0° and 360° which satisfy 2sin x - 3cos x = 0.[3 marks]
  2. 11(a)(ii)Find all the angles between 0° and 360° which satisfy 2sin² y - 3cos y = 0.[5 marks]

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