A Class Book of Trigonometry

a/sin acute angle angle AOP angle of elevation base-line BC² CA² centre CHAPTER circle of radius circumcircle cos-¹ cos¹ cos² cos² a sin² cos³ cosec cosec 30 cosine cot² cotangent cyclic quadrilateral drawn perpendicular equilateral triangle Example excircles Exercises find the angle find the area find the distance find the height Find the number Find the value formula given graph hypotenuse incircle inscribed LAOB Let ABC log cot logarithms negative number of radians obtuse PM² polygon described position OA principal value Prove r₁ right angle right-angled triangle rotating line sec² secant sin 2a sin a sin sin ẞ sin-¹ sin² sin³ sine Solve the equation spire tan-¹ tan² tangent triangle ABC triangle whose sides trigonometrical ratios Viva Viva Voce x'Ox π π пп