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The equation x^3=3/4x=-(sqrt(3))/8 is sa...

The equation `x^3=3/4x=-(sqrt(3))/8` is satisfied by `x=cos((5pi)/(18))` (b) `x=cos((7pi)/(18))` `x=cos((23pi)/(18))` (d) `x=cos((17pi)/(18))`

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The equation x^(3)-(3)/(4)x=-(sqrt(3))/(8) is satisfied by x=cos((5 pi)/(18))( b) x=cos((7 pi)/(18))x=cos((23 pi)/(18))( d) x=cos((17 pi)/(18))

cos((3pi)/(2) +x) cos(2pi+x)[cot(3pi)/(2)-x+cot(2pi+x)]=1

sin ((5 pi) / (18)) - cos ((4 pi) / (9)) = sqrt (3) sin ((pi) / (9))

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The value of cos ec((pi)/(18))-sqrt(3)sec((pi)/(18)) is a

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cos^3(x-((2pi)/3))+cos^3x+cos^3(x+((2pi)/3)))=3/4 cos3x