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Parin Sir > maths
13
Aug
Perpendicular Distance ( p )

☼ Perpendicular Distance ( p ) :–

 (i) If  P (x1, y1) is a point outside a line ax + by + c = 0, then perpendicular distance from P to line is,

p  =  PM  …

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13
Aug
Intercepts and Slope of  the standard equation

☼ Intercepts and Slope of  the standard equation :–

           If  AB  :  ax + by + c  =  0 intersects X – axis and Y – axis respectively at A and B, then

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13
Aug
Relation between two lines with respect to Slopes

☼ Relation between two lines with respect to Slopes :–

           Let the slopes of  two distinct lines  l1  and  l2 are respectively m1 and m2, then if

 (i) …

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Posted in: Relation between two lines with respect to Slopes,
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13
Aug
Slope ( m ) of  a line

☼ Slope ( m ) of  a line :–

  If  a line is perpendicular to X – axis ( or vertical ), then  Slope  =  m  =  ∞

    If  a line is parallel to Y – axis ( or

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13
Aug
Equation of  a line

☼ Equation of  a line :–

 ⟶ Parametric Equation of  a line :

{ (x, y) / x = tx2+ (1 – t)x1, y  = ty2+ (1 – t)y1 ; t ∈ R }

  

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13
Aug
Line

☼    LINE   ☼

☼ Parametric Equation of  a line :–


…

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Posted in: Line,
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12
Aug
Co–Ordinate Geometry

☼    POINT   ☼

► Distance Formula :–

\large \mapsto Distance between A and B is denoted by

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Posted in: Co–Ordinate Geometry,
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11
Aug
Calculus

…

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Posted in: Calculus,
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11
Aug
Index of Height & Distance

01. Angle of Elevation

02. Angle of Depression

03. Examples of Heig…

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Posted in: Index of Height & Distance,
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11
Aug
Examples of Height & Distance

(1) The shadow of a building is 30m long when the angle of elevation of the sun is 60o. Find the height of the building.

Soln. Let AB be the building and AC be its shadow.

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Posted in: Examples of Height & Distance,
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