Heights And Distances Angle Of Elevation The angle of elevation of the point viewed is the angle formed by the line of sight with the horizontal when the point being viewed is above the horizontal level, i.e. the case when we raise our head to look at the object. (see fig.) Angle Of Depression The angle of depression of a point on the object being viewed is the angle … [Read more...] about Heights And Distances

# Trigonometry

## Trigonometric Ratios Of Some Specific Angles

Trigonometric Ratios Of Some Specific Angles The angles 0°, 30°, 45°, 60°, 90° are angles for which we have values of … [Read more...] about Trigonometric Ratios Of Some Specific Angles

## Trigonometric Ratios Of Complementary Angles

Trigonometric Ratios Of Complementary Angles We know complementary angles are pair of angles whose sum is 90° Like 40°, 50°, 60°, 30°, 20°, 70°, 15°, 75° ; etc, Formulae: sin (90° – θ) = cos θ, cot (90° – θ) = tanθ cos (90° – θ) = sin θ, sec (90° – θ) = cosec θ tan (90° – θ) = cot θ, cosec (90° – θ) = sec θ Trigonometric Ratios Of … [Read more...] about Trigonometric Ratios Of Complementary Angles

## Trigonometric Identities

Trigonometric Identities https://www.youtube.com/watch?v=KlM76clMlD4 (1) Conditional trigonometrical identities We have certain trigonometric identities. Like sin2 θ + cos2 θ = 1 and 1 + tan2 θ = sec2 θ etc. Such identities are identities in the sense that they hold for all value of the angles which satisfy the given condition among them and they are called … [Read more...] about Trigonometric Identities

## Trigonometry: Solving for a Side

Trigonometry: Solving for a Side The word ‘trigonometry’ is derived from the Greek words ‘tri’(meaning three), ‘gon’ (meaning sides) and ‘metron’ (meaning measure). Trigonometry is the study of relationships between the sides and angles of a triangle. Applications of trigonometry: There are an enormous number of uses of trigonometry and trigonometric functions. … [Read more...] about Trigonometry: Solving for a Side