Plane and Spherical Trigonometry

acute angle algebra ambiguous angle opposite angles less base c.d. Log c.d. Log.Tan Nat circumcircle colog column common logarithms completely the triangle complex numbers computed Cos Log cos² cos³ cosecant cosh Cot Log Cot Nat decimal elevation angles equation Express figure Find log Find the distance Find the height formulæ functions of angles geometry Hence HYPERBOLIC FUNCTIONS incentre law of sines less than 360 lighthouse log sc loga loge mantissa miles natural functions negative observed obtuse perpendicular plane positive Prove cos² Prove tan-1 radians radius right angle right triangle sec² secant Show sin a sin sin¹ sin² sin³ sine and cosine sinh solution Solve completely spherical triangle subtends tan² terminal line tion triangle ABC triangle geometry triangle of reference trigonometric functions values whence ΙΙ ΙΟ ΙΟΙ