x^2+16xy+y^2-8=0 Write the appropriate rotation formulas so that in a rotated system the equation has no x'y'-term

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  1. The point P (-1,2) is rotated to become P′(2,1). Describe the rotation by degree and direction. (1 point) Responses −90°
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  2. The point P (-1,2) is rotated to become P′(2,1). Describe the rotation by degree and direction. (1 point) Responses 180°
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  3. The point P (-1,2) is rotated to become P′(2,1). Describe the rotation by degree and direction. (1 point) Responses 90°
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