## Solutions of the questions in Plane trigonometry |

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2A cos 2A 2A sin 2B 2B sin 2C 2cos 2sin A B C acute angle Asin centre circle ABC circumcircle cos(A cos(B-C cos0 cos2 cos2A cos2B cos2C cos3 cos4 cosB cosC cosec cot B cot cot0 cot2 cot2C cotC draw easy to show equal Examples on Chapter follows at once form the equations formula given h cot inscribed circle intersection Let ABC Let CD Let the height Let the perpendiculars Let the required middle point miles negative notation pedal triangle plane point of observation preceding example radians radical axis required angle result follows right angles sec2 sides Similarly sin0 sin2 sin2A sin2B sin2C sin3 sin4 sinB Sine Rule solution Spherical Trigonometry tan(a tan0 tan2 tan2A tana tower Trigonometry values