The elements of plane and spherical trigonometry. [With] Key

Algebra already apply base BC BC becomes calculation called centre CHAPTER circle circumference consider corresponding cosec cosine cotangent decreases described difference distance divided draw drawn equal equation established Euclid examples expressed extend fact feet figure formed formulæ four Geometry give given grades greater hypothenuse inches increases length less magnitude means measured method minutes opposite parallel perpendicular plane practical produced PROP proved quadrant radius ratios remaining represented Required respectively right angle right-angled triangle secant seen sides simple sin b sin sine solution solve sphere spherical triangle squares surface tangent theorem third three angles three sides Trigonometry values written