Plane Trigonometry, for Colleges and Secondary Schools

acute angles algebraic calculated called CHAPTER circle computation Construct cos² cosec cotangent deduced definitions denoted draw equal equation EXAMPLES expressed figure Find the distance Find the height formulas fourth quadrants geometry given angle graphical method Gresham College Hence hypotenuse inch incommensurable initial line inscribed isosceles triangle law of sines Leonhard Euler loga logarithms M₁ mantissa mathematics negative NOTE number of degrees OP₁ opposite perpendicular places of decimals plane positive angles problems protractor quantity radian measure radius ratios of 30 regular polygon relations represents revolving right angles right-angled triangle scale sec² secant shown in Art sin² sines and cosines Solve student is advised subtended tables tan² tangent terminal line tion tower triangle ABC trigono trigonometric functions trigonometric ratios turning line whole number X₁ ОР