Write the equation in terms of a rotated x'y'-system using ?, the angle of rotation. Write the equation involving x' and y' in standard form.5x2 - 6xy + 5y2 - 8 = 0; ? = 45°

A.  +  = 1
B. x'2 + 4y'2 = 1
C.  + y'2 = 1
D.  + 2y'2 = 1

Answer: C

Mathematics

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