X^2 /a^2 + y^2/b^2 is true if
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that's true x = asecθ + btanθ y = a tanθ + bsecθ x2 - y2 = a2sec2θ + b2tan2θ + 2absecθtanθ - a2tan2θ - b2sec2θ - 2absecθtanθ = a2(sec2θ - tan2θ) - b2(sec2θ ...
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