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

Answer 1

sin2t = 2 sint cost

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

Answer 2

Thanks :)

Answer 3

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