Polar coordinates, Sine rule, Cosine rule, Projection rule, Area of a triangle, Application
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In any ΔABC if a2 , b2 , c2 are in arithmetic progression, then prove that Cot A, Cot B, Cot C are in arithmetic progression.
- Trigonometric Functions - Expressing Sin (X±Y) and Cos (X±Y) in Terms of Sinx, Siny, Cosx and Cosy and Their Simple Applications
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