Recent content by spanglophile

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    Deriving equation for circle using sin and cos identities

    I meant to write the above post as: (x-a)^2 + y^2 = a^2
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    Deriving equation for circle using sin and cos identities

    Oh, I get it. So I could write it like this: (x-a)^2 + y^2 = a^2 (cos^2(2x) + sin^2(2x)) Then the identity takes care of the rest so I'm left with (x-a)^2 + y^2 = ^2 , right?
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    Deriving equation for circle using sin and cos identities

    Homework Statement I have been given these two equations: x=2acos^2(x) , y = 2a(cos(x))(sin(x)) where a ranges from 0 to 5 and -2π < x < 2π I need to prove that these equations (when you plug in values for x) create points that when plotted, give you a circle with center (x-a) and radius a...