definitions

When two straight lines meet at a point they form an angle. The point at which the arms meet (O) is known as the vertex of the angle. The amount of turning from one arm (OA) to other (OB) is called the measure of the angle ( AOB) and written as m AOB. An angle is measured in degrees,..

Intersection of two sets A and B is a set whose elements belong to both A and B. ..

(i) Angle of elevation, and (ii) Angle of depressio..

The figure is a unit circle, with origin O as centre cuts the x-axis at A (1,0) and let a variable point moving on the circumference move through an arc length q . i.e., AP = p( q ). The coordinates at the position of p( q ) are p(x,y) = (cos q , sin q ). Then the tangent function is defined ..

The acceleration of a moving point is the rate of change of its velocity. Note that the acceleration of a moving object is a vector, as it has both magnitude and direction. The acceleration is uniform when equal changes of velocity take place in equal intervals of time, in the same direction, howe..

The speed of a moving particle is the rate at which it describes its path. Mathematically, this may be expressed in the following way. If a moving particle covers a distance s in a given interval of time, say, t then, the quantity s/t, is the measure of the speed of the moving particle at the inst..

Magnetic flux can be defined as the number of lines of force passing through a surface normally. Considering the surface ' D s' in a magnetic field 'B..

Collinear vectors - Collinear vectors are those vectors that act either along the same line or along parallel lines. These vectors may act either in the same direction or in opposite direction..