Transcription of INTRODUCTION TO TRIGONOMETRY AND ITS APPLICATIONS
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(A) Main Concepts and Results Trigonometric Ratios of the angle A in a triangle ABC right angled at Bare defined as:sine of A = sin A = sideoppositetoABChypotenuseAC =cosine of A = cos A = sideadjacenttoAABhypotenuseAC =tangent of A = tan A = sideoppositetoABCsideadjacenttoangleAAB = cosecant of A = cosec A = 1 ACsinABC=secant of A = sec A1AC cosAAB==cotangent of A = cot A = 1 ABtan ABC=tan A = sinAcosA, cot A = cosAsinAINTRODUCTION TO TRIGONOMETRY AND ITS APPLICATIONSCHAPTER 803/05/1888 EXEMPLAR PROBLEMS The values of trigonometric ratios of an angle do not vary with the lengths of thesides of the triangle.
INTRODUCTION TO TRIGONOMETR Y AND ITS APPLICATIONS 89 • The ‘line of sight’ is the line from the eye of an observer to the point in the object viewed by the observer. • The ‘angle of elevation’ of an object viewed, is the angle formed by the line of sight with …
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