Differentitate X=2cosa-cos2A , Y=2sina-sin2A.
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Naveen Sharma 8 years, 3 months ago
{tex}x = 2cosa - cos 2a ..... (1) \\ y = 2sin a - sin2a .... (2) \\ differentiate \ (1) w.r.t \ a, \ we \ get \\ {dx\over da} = -2sina +2.sin2a .... (3) \\ differentiate \ (2) w.r.t \ a, \ we \ get \\ {dy\over da} = 2cosa -2.cos2a .... (4) \\ divide\ (4) \ by \ (3), we\ get \\ {dy\over dx} = {2cosa-2cos2a\over -2sina +2.sin2a}{/tex}
{tex}{dy\over dx} = {cosa-cos2a\over -sina+sin2a}{/tex}
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