... 2[(sin2x +cos2x)3–3 sin2xcos2x (sin2x +cos2x) +t[(sin2x + cos2x)2–2sin2x cos2x]=–1 [Q(a +b)3 = a3 +b3+3ab (a+b) and (a+b)2=a2+b2+2ab where a=sin2x, ...
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