Consider the equation ax2 bxy cy2 d, where b 0 Introduce new variables x1 and y1 by rotating the axes counterclockwise through an angle Icirc cedil Show that the resulting equation has no xy1 term if Icirc cedil is given by sn 20

Question: Consider the equation ax2 + bxy + cy2 = d, where b 0. Introduce new variables x1 and y1 by rotating the axes counterclockwise through

Consider the equation ax2 + bxy + cy2 = d, where b ‰ 0. Introduce new variables x1 and y1 by rotating the axes counterclockwise through an angle Î¸. Show that the resulting equation has no xy1-term if Î¸ is given by

sn 20 =

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