What are the trigonometric identities?

Trigonometric Identities are true for every value of variables occurring on both sides of an equation.
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The reciprocal trigonometric identities are:
  • Sin θ = 1/Csc θ or Csc θ = 1/Sin θ
  • Cos θ = 1/Sec θ or Sec θ = 1/Cos θ
  • Tan θ = 1/Cot θ or Cot θ = 1/Tan θ
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What are all the trigonometric identities?

Complementary and Supplementary Trigonometric Identities
  • sin (90°- θ) = cos θ
  • cos (90°- θ) = sin θ
  • cosec (90°- θ) = sec θ
  • sec (90°- θ) = cosec θ
  • tan (90°- θ) = cot θ
  • cot (90°- θ) = tan θ
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What are the 11 trig identities?

Terms in this set (11)
  • sinx. 1/cscx.
  • cosx. 1/secx.
  • tanx. 1/cotx.
  • cscx. 1/sinx.
  • secx. 1/cosx.
  • cotx. 1/tanx.
  • tanx. sinx/cosx.
  • cotx. cosx/sinx.
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What are the 6 trigonometric identities?

The six trigonometric identities or the trigonometric functions are Sine, Cosine, Tangent, Secant, Cosecant and Cotangent. They are abbreviated as sin, cos, tan, sec, cosec and cot.
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What are the 8 fundamental identities?

Terms in this set (8)
  • Reciprocal: csc(θ) = csc(θ) = 1/sin(θ)
  • Reciprocal: sec(θ) = sec(θ) = 1/cos(θ)
  • Reciprocal: cot(θ) = cot(θ) = 1/tan(θ)
  • Ratio: tan(θ) = tan(θ) = sin(θ)/cos(θ)
  • Ratio: cot(θ) = cot(θ) = cos(θ)/sin(θ)
  • Pythagorean: sin costs = $1. ...
  • Pythagorean: I tan = get sic. ...
  • Pythagorean: I cut = crescent rolls.
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Intro to Trigonometric Identities - part 1



What are the 3 main trigonometric identities?

Sine, cosine and tangent are the primary trigonometry functions whereas cotangent, secant and cosecant are the other three functions.
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List of Trigonometric Identities
  • Sin θ = 1/Csc θ or Csc θ = 1/Sin θ
  • Cos θ = 1/Sec θ or Sec θ = 1/Cos θ
  • Tan θ = 1/Cot θ or Cot θ = 1/Tan θ
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What are the 12 trig functions?

The list of trigonometric identities shows more relations between these functions.
  • crd(θ) = 2 sin( θ/2)
  • versin(θ) = 1 − cos(θ) = 2 sin2( θ/2)
  • coversin(θ) = 1 − sin(θ) = versin( π/2 − θ)
  • haversin(θ) = 1/2versin(θ) = sin2( θ/2)
  • exsec(θ) = sec(θ) − 1.
  • excsc(θ) = exsec( π/2 − θ) = csc(θ) − 1.
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What are the 3 trigonometric identities Class 10?

Trigonometric Identities are
  • cos 2 θ + sin 2 θ = 1.
  • 1 + tan 2 θ = sec 2 θ
  • 1 + cot 2 θ = cosec 2 θ
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What is the fourth identity?

Factoring Algebra Identities

Identity-I: a2 – b2 = (a + b) (a – b) Identity-II: a3 – b3 = (a – b) (a2 + ab + b2) Identity-III: a3 + b3 = (a + b) (a2 – ab + b2) Identity-IV: a4 – b4 = (a2 – b2) (a2 + b2)
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How many trigonometric formulas are there?

Ans: The three formulas of trigonometry are Sine, cosine and tangent.
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Why there are only 6 trigonometric functions?

There are only 6 trigonometric ratios because only 6 ratios can define ratios of all sides. For example, If you want ratio between perpendicular and hypotenuse there is sin. If you want ratio between perpendicular and base there is tan.
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Are there more than 6 trigonometric functions?

The historical answer: At least 12

There are at least six more trigonometric functions that at one time were considered worth naming. These are versine, haversine, coversine, hacoversine, exsecant, and excosecant. All of these can be expressed simply in terms of more familiar trig functions.
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What is a 45 degree triangle?

A 45 – 45 – 90 degree triangle (or isosceles right triangle) is a triangle with angles of 45°, 45°, and 90° and sides in the ratio of. Note that it's the shape of half a square, cut along the square's diagonal, and that it's also an isosceles triangle (both legs have the same length).
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How do you memorize Sohcahtoa funny?

Silly old Henry caught Albert Hugging two old Aunts. Some Old Hag Cracked All Her Teeth On Asparagus. Some Old Hairy Camels Are Hairier Than Others Are. Some Old Hippy Caught Another Hippy Tripping on Acid.
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Is calculus a trigonometry?

It seems as though calculus applies trigonometric functions in the same way algebra does, i.e. it's a system of operations which doesn't depend on things like trig' in any way, but rather serves as a foundation/context for using trig'.
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What grade level is trig?

In general, trigonometry is taken as part of sophomore or junior year math. In addition to being offered as its own course, trigonometry is often incorporated as a unit or semester focus in other math courses.
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Can I teach myself trigonometry?

Teach Yourself Trigonometry is suitable for beginners, but it also goes beyond the basics to offer comprehensive coverage of more advanced topics. Each chapter features numerous worked examples and many carefully graded exercises, and full demonstrations of trigonometric proofs are given in the answer key.
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