Elements of Plane and Spherical Trigonometry

abscissa altitude B₁ C₁ check formula circle co-function colog computed construct cos B cos cos(a cos¹ cos² cos³ cosh cot² curve distance divided equal excircles EXERCISES feet Find the lengths formulæ Half-angles Hence horizontal hyperbolic functions hypotenuse inches isosceles latitude less than 90 log cot logarithms m₁ measure negative ordinate orthocenter pedal triangle plane polar triangle positive quadrant angles R₁ radians radius right angle right triangle sec² second quadrant Show similar expressions sin B cos sin B sin sin x sin-¹ sin² sin³ sinh solution Solve the triangle sphere spherical right triangle spherical triangle student substitute subtends tan-¹ tan² tangent tanh theorem triangle ABC trigonometric functions unity values