A treatise on plane and spherical trigonometry

A.cos base called centre CHAPTER chord circle complement computed cos.a cos.b cos.c cosec described diameter difference dividing draw drawn edges English equal equation Examples expression faces feet figure Find the area find the sine formulas four fourth French given greater Hence included increases infinite inscribed known less lines log.c logarithmic measure meet minutes multiple nearly negative observed obtain opposite perimeter plane pole polygon positive prove quadrant quantities radius regular remaining respectively right angle rules secant sides signs similarly sin.a sin.b sin.c sine and cosine solid solution sphere spherical triangle subtend supplement surface tangent theorem third triangle in terms Trigonometry values whence