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Half angle
- sin(A) = 2*Sqr(s*(s-a)*(s-b)*(s-c))/(b*c)
- sin(A/2) in terms of s
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Heron formula
- Tiangle area = Sqr(s*(s-a)*(s-b)*(s-c))
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Hexadecial number system
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Hyperbola : Formula and examples
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Hyperbola : Locus
- 1. Two fixed points F and G. If PF - PG = 8, Find locus of P
- 2. Prove locus of hyperbola is (x/a)^2 - (y/b)2 = 1
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Hyperbola : (x/a)^2 - (y/b)^2 = -1
- 1. Comparison : (x/a)^2 - (y/b)^2 = -1 and (x/a)^2 - (y/b)^2 = 1
- 2. Prove that x = sec(t) and y = tan(t) is a hyperbola
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Hyperbola : R = (D*e)/(1 - e*cos(A))
- 1. Convert (x/4)^2 - (y/3)^2 = 1 to polar form
- 2. Convert R = 2.25/(1 - 1.25*cos(A)) to rectangular form
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Hyperbola : R = (D*e)/(1 + e*cos(A))
- 1. Compare R = (D*e)/(1 - e*cos(A)) and R = (D*e)/(1 + e*cos(A))
- 2. Study hyperbola x*y = 1
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Hyperbola : x*y = 1
- 1. Compare x*y = 1 and (x/a)^2 - (y/b)^2 = 1
- 2. Find focal length and equation of directrix of hyperbola x*y = 1
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Hyperbola : Sketch tangent using reflection
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Hyperbolic functions : Formula and examples
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Hyperbolic functions : Compare with trigonometric function
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Hyper geometric probablity : formula and examples
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