4) The lemniscate curve (x2 + y² )² = 4(x² – y²) was discovered by Jacob Bernoulli in 1694, who noted that it is "shaped like a figure 8, or a knot, or the bow of a ribbon." Find the coordinates of the four points at which the tang line is horizontal. -1t FIGURE 9 Lemniscate curve: (x² + y²)² = 4(x² – y²).

Trigonometry (MindTap Course List)
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Chapter1: The Six Trigonometric Functions
Section1.4: Introduction To Identities
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4) The lemniscate curve (x2 + y² )² = 4(x² – y?) was discovered by Jacob Bernoulli in 1694, who noted that it is
"shaped like a figure 8, or a knot, or the bow of a ribbon." Find the coordinates of the four points at which the tangent
line is horizontal.
FIGURE 9 Lemniscate curve: (x² + y²)² = 4(x² – y²).
Transcribed Image Text:4) The lemniscate curve (x2 + y² )² = 4(x² – y?) was discovered by Jacob Bernoulli in 1694, who noted that it is "shaped like a figure 8, or a knot, or the bow of a ribbon." Find the coordinates of the four points at which the tangent line is horizontal. FIGURE 9 Lemniscate curve: (x² + y²)² = 4(x² – y²).
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