Trigonometry l class 10th l learn trigonometry.
TRIGONOMETRY } INTRODUCTION } In this chapter, we intend to study an important branch of mathematics called “ Trigonometry ”. } The word trigonometry is derived from the greek words, trigonon and metron were ‘trigonon’ mean triangle and ‘metron’ mean measure. } In broader sense it is that branch of mathematics which deals with the measurement of the sides and the angels of a triangle and the problems allied with angles. History Aryabhata was the first who uses the idea of sine. “Cosine” and “tangent” came later in which Cos was first used by Sir Jonas Moore an English Mathematician TRIGONOMETRIC RATIOS } The six trigonometric ratios relates the sides of a right triangle to its angles. Specifically they are ratios of two sides of a right triangle and a related angle. } Sin A = Opposite side/ hypotenuse } Cos A = Adjacent side/ hypotenuse } Tan A = Oppo...