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1ST YEAR BOOK
2ND YEAR BOOK
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Spherical and Trigonometry and Spherical Astronomy
Chapter_1_Spherical Triangle
Chapter_2_Right-Angled Triangles, Area, and Spherical Excess
Chapter_3_System of Coordinates
Chapter_4_Motion of Earth and Twilight
Chapter_5_Astronomical Instruments And Meridian Circle
Chapter_6_Kepler’s Law And Time
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