MATH

does anybody know how 1.04(cosA)^2 + 0.2(cosA) -0.75 = 0 become (cosA)^2 + 0.192(cosA) - 0.721 = 0

asked by Anonymous
  1. Are you kidding?

    1.04 ( cos A )² + 0.2 ( cos A ) - 0.75 = 0

    Divide both sides by 1.04

    1.04 ( cos A )² / 1.04 + 0.2 ( cos A ) / 1.04 - 0.75 / 1.04 = 0 / 1.04

    ( 1.04 / 1.04 ) ∙ ( cos A )² + ( 0.2 / 1.04 ) ∙ ( cos A ) - 0.75 / 1.04 = 0

    1 ∙ ( cos A )² + ( 0.2 / 1.04 ) ∙ ( cos A ) - 0.75 / 1.04 = 0

    ( cos A )² + 0.19231 ( cos A ) - 0.72115 = 0

    approx.

    ( cos A )² + 0.192 ( cos A ) - 0.721 = 0




    posted by Bosnian
  2. Magic math.

    posted by bobpursley

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