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Trigonometry formula-class 11

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Trigonometry formula     (part -1)
Sin   Cos   Tan 
Cot   Sec  Cosec
Trigonometry (from Greek trigōnon, "triangle" and metron, "measure") is a branch of mathematics that studies relationships involving lengths and angles of triangles.
Basic formula
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Trigonometry ratio of  different angles. 
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Sign of Trigonometry Ration in Different Quadrent
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Trigonometric formula


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Compound angles
 A compound angle formula or addition formula is a trigonometric identity which expresses a trigonometric function of (A+B) or (A−B) in terms of trigonometric functions of A and B .
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cot (A + B) = cot A cot B - 1/cot B + cot A

cot (A - B) = cot A + cot B + 1/cot B - cot A

Transformation angles
  • Sin (A+B) + Sin(A-B) =2 SinA cosB
  • Sin (A+B) - Sin(A-B)  =2 CosA sinB

  • Cos (A+B) + Cos(A-B) = 2 CosA cosB
  • Cos (A+B) - Cos(A-B)  = -2 SinA sinB
  • Cos (A-B) - Cos(A+B)  =  2 SinA sinB
          

 Multiple Angles
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 Sub Multiple Angles
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1 comment:

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