cos(60)=6/a

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Solution for cos(60)=6/a equation: 


D( a )

a = 0

a = 0

a = 0

a in (-oo:0) U (0:+oo)

cos(60) = 6/a // - 6/a

cos(60)-(6/a) = 0

cos(60)-6*a^-1 = 0

-6*a^-1 = -cos(60) // : -6

a^-1 = cos(60)/6

-1 < 0

1/(a^1) = cos(60)/6 // * a^1

1 = (cos(60)/6)*a^1 // : cos(60)/6

6*(cos(60))^-1 = a^1

a = 6*(cos(60))^-1

a = 6*(cos(60))^-1

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