Elements of Plane and Spherical Trigonometry: With Numerous Examples

3d quadrant acute angle Algebra ambiguity angle AOP angle of elevation centre circle circular measure Cloth colog cos a cos cos² cosc cosec cosine cot² cotangent denote English equal equation EXAMPLES express feet high find the height Find the number formulæ formulæ of Art Geometry Given two sides greater than 90 Hence hypotenuse Illustrated included angle Lessons Let ABC log cot logarithms method Napier's Rules negative observed opposite angle Paper perpendicular Plane and Spherical polar triangle positive Prove the following quadrantal triangle radian radius respectively right angles right triangle secant Sexagesimal Similarly sin A cos sin b sin sin x sin² sin²x siny spherical triangle Spherical Trigonometry subtends tan² tan²x tangent three angles tions triangle ABC trigonometric functions vertical Wells's yards ОР