First slide
Functions (XII)
Question

If fx=sin2x+sin2x+π3+cosxcosx+π3 and  g54=1, then gofx is  ________

Moderate
Solution

fx=sin2x+sin2x+π3+cosxcosx+π3=sin2x+14sinx+3cosx2+12cosxcosx-3sinx=54sin2x+cos2x=54gofx=gfx=g5/4=1

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