definitions

Parin Sir > definitions
11
Aug
Angle of Depression

☼ Angle of Depression  :   Suppose a man from a point  P  looks down at an object  B,  placed below the level of his eye, then the angle which the line of  sight makes with the horizontal through  P, is called the angle of depression…

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11
Aug
Height & Distance

☼ Angle of Elevation  :   Suppose a man from a point  P looks up at an object B, placed above the level of his eye. Then, the angle which the line of sight makes with the horizontal through P, is called the angle of elevation of B  a…

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Posted in: Height & Distance,
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11
Aug
Index of T-Ratios & Identities

01. Introduction

02. Some Basic  Concepts

03. Level Functions

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Posted in: Index of T-Ratios & Identities,
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11
Aug
Examples 16 to 18 of T-Ratios & Identities

(16) If  sinθ  =  \frac{3}{5}, find the values of

         sin 2θ, cos 2θ, tan 2θ, sin 3θ  and  cos 3θ.

Soln. cosθ …

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Posted in: Examples 16 to 18 of T-Ratios & Identities,
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11
Aug
Examples 11 to 15 of T-Ratios & Identities

(11) If  a2 + b2 + c2  =  r2  and  a  =  r cos A sin B,  b  = r sin A sin B, find the value of c.

Soln. a2 + b2  =  r2 cos2 A sin2 …

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Posted in: Examples 11 to 15 of T-Ratios & Identities,
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11
Aug
Examples 6 to 10 of T-Ratios & Identities

 (6) Evaluate :  sin{\frac{\pi}{6}}+cos{\frac{\pi}{3}}-{cot}^3{\frac{\pi}{4}}+cos{e}c^2\f... </p> <div class=

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11
Aug
Examples 1 to 5 of T-Ratios & Identities

(1) Convert  \frac{7\pi}{6} radians into degrees.

Soln. \pi... </p> <div class=

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11
Aug
Domain Range Co-domain Zeros and Principal Period of Trigo Functions  : -

☼   Domain, Range, Co-domain, Zeros and Principal Period of Trigo. Functions  : –

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11
Aug
Value of Trigonometric Function

☼   Value of Trigonometric Function  : –

 

θ

 

Function
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11
Aug
Trigonometric  Addition  Formulae

☼   Trigonometric  Addition  Formulae  : –

sin (\alpha+\beta)   =   sinα cosβ + cosα sinβ

sin (

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Posted in: Trigonometric  Addition  Formulae,
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