Plane trigonometry, and its application to mensuration and land surveying. Accompanied with all the necessary logarithmic and trigonometric tables (1852)
Perkins, George R. (George Roberts), 1812-1876 · New York, D. Appleton · leaf 15
AP. I. Definition of Sines, Tangents, Secants, (&c. § 8. In a right triangle the sine of either of the acute anglesis the quotient obtained by divi-ding the side opposite the givenangle by the hypotenuse. Thus, in the right triangle ABC,if we represent the base, perpen-dicular, and hypotenuse,… … P. tangent A = ~; tangent C = V The seca/nt of either of the acute angles is the quotient ob-tained by dividing the hypotenuse by the side adjacent thegiven angle. Thus, secant A = T: secant C = —.o p The cosine, cotangent, and cosecant of any angle are respect-ively the sine, tangent, and secant…
Plane trigonometry · Surveying
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