f)cos2x+(10-√3)sinx+5√3-1=0g)cos^2(π/2+2x)-cos^2×2x-3cos(π/2-2x)+2=0a)sin5x+cos5x=√2b)√3cos3x+sin3x=√2c)2sinx-5cosx=5d)cos(x+90°)+√3cos(-x)=√3
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