Trigonometric Functions

Prerequisite : Angle and Its Measurement Trigonometric Functions The trigonometric functions are functions of angles. In the blogpost 'Angle and Its Measurement', we studied what an angle is and how it is measured. An important concept to be recalled is that of coterminal angles. These are the angles, whose initial and terminal rays are identical… Continue reading Trigonometric Functions

Applications of Vectors in Geometry

Vectors are such a powerful tool in mathematics and physics, that many results can be proved very easily and intuitively.     Statement : If the diagonals of a parallelogram are congruent, then it is a rectangle. Proof : Let $latex ABCD$ be the parallelogram. Let $latex A$ be the origin. So, the position vectors… Continue reading Applications of Vectors in Geometry