Maths formulas for class 10 chapter- Introduction to Trigonometry
Class 10 chapter- Introduction to Trigonometry Formula
Introduction and Application of Trigonometry
Definition of Angle If we rotate a line segment with respect to any of its end points, then amount of rotation is called angle. If rotation exists in anti-clock wise direction, angle is said to be positive, otherwise negative.
Trigonometric ratios for any right angled triangle
sineθ =sinθ, cosineθ = cosθ, tangentθ = tanθ, cosecantθ = cosecθ, secantθ = secθ
Where p→perpendicular, h→ hyptenuse, b→ base
Values of Trigonometric ratios of 0° to 90°
|θ||0 °||30 °||45 °||60 °||90 °|
|tan θ°||0||1/√3||1||√3||Not defined|
Line of sight : The line of sight (or line of vision) is the line from our eyes to the object.
Angle of Elevation : Angle between horizontal line and line of sight, if the object is above the horizontal level of eyes.
Angle of Depression : Angle between horizontal line and line of sight, if the object is below the horizontal level of eyes
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