Elements of Trigonometry: Plane and Spherical

algebraic signs arc A M arc corresponding calculations circumference Co-tangent complement cos a cos cos a sin cos² cosec decimal deduce determine Dist distance ecliptic equal equation expressed figure find the Logarithm find the sine formulæ given number gives hence hypothenuse known less log tang loga logarithmic sine logarithms of numbers minutes mulæ multiplying natural number number of degrees obtain opposite perpendicular plane triangle positive proportional quadrant radius ratio readily relation Required the logarithmic right ascension right-angled triangle secant similar triangles sin a cos sin a sin sin a+b sin² sine and cosine sines and tangents solution spherical triangle substitute subtracted tabular number tang a+b tang atang tanga tangent Theorem tions triangle ABC trigonometrical lines unity values whole number yards ΙΟ