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Trigonometric ratios of angles in the form of (π/2±θ),(π±θ),(-θ) ( (π/2±θ),(π±θ),(-θ) ආදී කෝණ සඳහා ත්‍රිකෝණමිතික අනුපාත)

SJP Mathematics in Sinhala Series – A/L Pure Mathematics (Year 12)
Department of Mathematics, University of Sri Jayewardenepura

Contact: combinedmathsvideos.sjp@gmail.com

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