senior class formulae

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 MATHEMATICAL VIDYAMANDIR -experience the excellence- TRIGONOMETRIC FORMULAE Compiled by: OP GUPTA   Elect.& Comm . Engg .; B.Sc.Ma ths(H)- Part II   INDIRA AWARD WINNER   . : ontact No 91 9650 350 480  e-id: [email protected] Basic Trigonometric Relations  1.a) 2 2 sin cos 1    b) 2 2 1 tan sec    c) 2 2 1 cot cosec    2.a) sin sin    b) cos cos    c) tan tan    3.a) sin tan cos      b) 1 tan cot     c) cos cot sin      1 cosec sin    e) 1 sec cos     4.a) sin sin cos cos sin  A B A B A B  b) sin sin cos cos sin  A B A B A B  c) cos cos cos sin sin  A B A B A B  d) cos cos cos sin sin  A B A B A B  5.a) tan tan tan 1 tan tan  A B  A B  A B  b) cot cot 1 cot cot cot  B A  A B  B A  6.a) sin2 2sin cos  A A A  b) 2 2 cos2 cos sin  A A A  c) 2 cos 2 2 cos 1  A A  d) 2 2 cos 1 cos2  A A  e) 2 cos2 1 2sin  A A  f) 2 2sin 1 cos2  A A  g) 2 2tan sin2 1 tan  A  A  A  h) 2 2 1 tan cos2 1 tan  A  A  A  i) 2 2tan tan2 1 tan  A  A  A  7.a) 3 sin3 3sin 4 sin  A A A  b) 3 cos 3 4 cos 3 cos  A A A  c) 3 2 3t an tan tan3 1 3tan  A A  A  A  8.a) sin sin 2sin cos 2 2  A B A B  A B  b) sin sin 2 cos sin 2 2  A B A B  A B  c) cos cos 2 cos cos 2 2  A B A B  A B  d) cos cos 2sin sin 2 2  A B A B  A B  9.a) sin sin 2sin cos A B A B  A B  b) 2 sin sin cos si n A B A B  A B  c) cos cos 2co s cos A B A B  A B  d) cos cos 2si n sin A B A B  A B  Relations in Different Measures of Angle   Angle in Radia n Measu re = Angle in Degre e Measu re × 180   o 1Righ t ang le 90   o 1 =60, 1 =60   ( )   l in radian measure r    o 1 = = 0. 01745 rad ians app rox ima tely 180   206265 o 1 rad ian= 57 17 45 or seconds  

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