Trigonometry

This topic covers concepts, such as Relation between Radian, Degree and Grade, sec(90-A), Trigonometric Ratios of 15 Degree and 75 Degree, Relation between Tangent and Cotangent, cosec(90-A), Relation between Cotangent, and Sine and Cosine.

This topic covers concepts, such as Expansion of sin2A, Expansion of Cos(A-B), Expansion of Sin(A+B), Trigonometric Identities for Compound Angles, Expansion of sin3A, and Expansion of Tan(A+B).

This topic covers concepts, such as Pythagorean Identities for Trigonometric Functions, Trigonometric Functions of (π-θ), Trigonometric Functions for Angle θ ∈ R, Trigonometric Functions of (3π/2+θ), Domain, and Range and Graph of cosec(x).

This topic covers concepts, such as General Solution of Trigonometric Equations: sin(x) = sin(a), Methods to Solve Trigonometric Equations Reducible to Quadratic Form, and General Solution of Trigonometric Equations: cos(x) = 0.

This topic covers concepts, such as Angle of Elevation, Line of Sight in Trigonometry, Heights and Distances, Angle of Depression, and Some Applications of Trigonometry.