A Treatise on Plane and Spherical Trigonometry

a+b+c A₁ applied B+AB becomes C+AC C₁ coefficients computation cos b cos cos B sin cos² cos³ cosb cosc cosec Csin deduce difference differential employed equal equations EXAMPLE expressed factors formulæ gives hypotenuse imaginary increments integer less than 180 log cot logarithms multiple angle negative obtain perpendicular plane triangle polar triangle positive preceding article quadrant radius reduced right angle right triangles second member simple angle sin b sin sin c cos sin x sin² sin³ sine sine and cosine solution solve the triangle spherical triangle spherical trigonometry Substituting the values tables tan-¹ tan² tan³ tangent theorem Trig trigonometric functions whence x₁ zero Δα