Elementary text-book of trigonometry

angle AOB applications base bears becomes calculations called centre changes CHAPTER characteristic circle circumference cloth complement consider contains cos(A cos2A cosA cosB cosC cosecA cosine cotA decimal definitions degree measure denote described determined diameter difference direction distance dividing drawn equal equation Euclid EXAMPLES Express feet figure find the values formulæ fraction given greater height Hence horizontal inches increases length logarithm magnitude miles minutes nearly negative object observed opposite perpendicular polygon positive Prove radian measure radius Reader regular relations represented respectively right angle root secA sides Similarly sin(A sin2A sinA sinB sine Solve square Standard student subtends taking tan(A tanA tanB tangent third tower triangle triangle ABC trigonometrical ratios unit usual written yards