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PLANE Trigonometry (Part -II), written by S. L. Loney, is the second part of the popular textbook on plane trigonometry. Analytical concepts of plane trigonometry are explained lucidly in this book. The chapters in this book include complex quantities and exponential series for complex quantities, principles of proportional parts, errors of observation, exponential and logarithmic series, miscellaneous proportions, Gregory’s series, and summation of series. Some of the subtopics in this classic book on trigonometry include sines and cosines of small angles, binomial theorem for complex quantities, hyperbolic functions, Euler’s exponential values, expansions in series, logarithmic values of complex quantities, and errors of observation.ISBN-9788183552882
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