3 marksSolving Simple Trigonometric Equations

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

Find all the angles between 0° and 360° which satisfy 2sin x - 3cos x = 0.

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11(a)(ii)Find all the angles between 0° and 360° which satisfy 2sin² y - 3cos y = 0.[5 marks]
11(b)Find, correct to 2 decimal places, all the values of z for which sin(2z + 1) = 0.9.[3 marks]

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