Maths trig

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Use compound angle formulae to express Second harmonic i2= sin2t and the the third harmonic i3=sin3t in terms of the first harmonic sint

  • Maths trig -

    sin2t = 2 sint cost

    sin3t = sint cos2t + cost sin2t
    (cos2t = 1 - 2sin^2 t)

  • Maths trig -

    Thanks :)

  • Maths trig -

    Whats the workings out to get to these answers ? Jw ta

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