A Treatise on Plane and Spherical Trigonometry

applied becomes Bowditch's Rules C+AC C₁ computation constant cos A sin cos b cos cos² cos³ cosb cosc cosec cosine cosm cot A cot deduce denote difference differential divided employed equal equations EXAMPLE expressed factors formulæ gives hypotenuse increments less than 180 log cot Napier's Rules negative obtain perpendicular plane triangle polar triangle positive preceding article quadrant quotient radius reduced right angle right triangles secant second member simple angle sin b cos sin b sin sin x sin² sin³ sine sine and cosine solution solve the triangle spherical triangle spherical trigonometry tables tan-¹ tan² tana tangent theorem Trig trigonometric functions whence Δα