d1truth

09-11-2005, 02:39 PM

Rotate the point A(1,2) with respect to point B(3,4) for the angle 35 degrees, and find the coordinates for the rotated point.

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d1truth

09-11-2005, 02:39 PM

Rotate the point A(1,2) with respect to point B(3,4) for the angle 35 degrees, and find the coordinates for the rotated point.

stapel

09-11-2005, 02:54 PM

What tools and/or methods have you been taught for doing this? Are you using matrices? Triangles and trig? Something else? In which direction does the rotation go? Clockwise, or anti-clockwise?

Thank you.

Eliz.

Thank you.

Eliz.

d1truth

09-11-2005, 03:03 PM

its matrices and counterclockwise.

pka

09-11-2005, 03:46 PM

In geometry the rotation about the point (h,k) through Θ is;

x’−h=(x−h)cos(Θ)−(y−k)sin(Θ)

y’−k=(x−h)sin(Θ)+(y−k)cos(Θ).

x’−h=(x−h)cos(Θ)−(y−k)sin(Θ)

y’−k=(x−h)sin(Θ)+(y−k)cos(Θ).

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