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- Small conclusion of college entrance examination mathematics
Small conclusion of college entrance examination mathematics
F 1 F2 is the ellipse x 2/a 2+y 2/b 2 =1,and the two focal points p are any points on the ellipse ∠ f1pf 2 = θ.
The area of △F 1PF2 is b 2tan (θ/2). Similarly, if it is a hyperbola, it is b 2cot (θ/2).
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