terminal rays

1. Trigonometry is that branch of mathematics which deals with the measurements of sides and angles of triangles. 2. The figure obtained by rotating a given ray about its end point is called an angle. 3. An angle is called negative if the direction of rotation of ra..

An angle is an amount of rotation of a half-line (or ray) in a plane about its end point from an initial position to a terminal position. The important terms are: Measurement of angle, Positive and Negative angles, Lines at right angles, Quadrants, Angle in standard positi..

Angles - Fig.(i) Fig.(ii) Fig.(iii) Let OA and OB two half lines with common end point O. The half lines OA and OB are the sides of an angle and the point O is the vertex of the angle. An angle is an amount of rotation of a half-line (or ray) in a plane about its end point from an initial..

When certain metals are heated to a high temperature, they emit thermions (electrons) and the phenomenon is called thermionic emission Cathode rays are a stream of negatively charged particles emitted from the cathode of an evacuated bulb, when a voltage of nearly 3000 volts given ac..

Habit: Mostly annual herbs, rarely shrubs and trees. fig. 27.38 Habit, L.S. of inflorescence and florets Root: Taproot system, branched. Stem: Herbaceous or woody, erect, branched. Leaves: Simple, alternate or opposite, exstipulate, petiolate, hairy, reticulate venation. Infloresc..

Trigonometry is that branch of mathematics which deals with the measurements of sides and angles of triangles. The figure obtained by rotating a given ray about its end point is called an angle. An angle is called positive if the direction of rotation of ray from initia..

/trigonometry/right-angled-triangles/right-angled-trianglesindex.php'>right angled triangles only. Trigonometrical Identities The trigonometric ratio's are: Sine, Cosine, Tangent, Cotangent, Secant, and Cosecant. Trigonometric Tables Trigonometric tables are used (1). to find the value of a t-ratio..