Elementary Trigonometry

acute angle algebraical approximately axes axis B₁ C₁ calculation CHAPTER chord circle circular functions circular measure cos A cos cos² cos³ cosec cot² decimal definitions digits direction distance equal equation examples express figure final line formulae fourth quadrant given angle given sine given value graph Hence horizontal initial line loga logarithm magnitude mantissa multiplied negative number obtained obtuse angle opposite pedal triangle perpendicular polygon positive or negative possible fractional error principal value projection proper fraction Prove radians radius result right angles right-angled triangle sec² segment shew sides sin A sin Sin-¹x sin² sin³ sine square subtraction supplementary acute angle tables tan-¹ tan² tangent third quadrant triangle ABC trigonometrical ratios unit of length X'OX Y'OY yards π π