Lemma

Trigonometry · Chapter 8 of 11

Laws of sines & cosines

7 curated · 50 from open sources · 180 thousand generated

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Law of cosinesMedium · 180 thousand variations

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7
#TitleDifficultyTags
122The third sideLaws of sines & cosinesEasyLaw of cosines
697The law of sinesLaws of sines & cosinesEasyLaws of sines & cosines
699Area from two sides and an angleLaws of sines & cosinesEasyLaws of sines & cosines
701A cosine in the 3-4-5 triangleLaws of sines & cosinesEasyLaws of sines & cosines
77The sine rule sees the circleTriangles and circlesMediumInscribed angle theoremCircumcircle
698The largest angleLaws of sines & cosinesMediumLaws of sines & cosines
700The circumradiusLaws of sines & cosinesMediumLaws of sines & cosines

From open sources

50

Complete problems only, with worked solutions first. Show everything

#TitleDifficulty
104297Non-right Triangles: Law of Sines · Try It 1Easy
104301Finding the Area of an Oblique TriangleEasy
104303Non-right Triangles: Law of Sines · Exercise 1Easy
104305Non-right Triangles: Law of Sines · Exercise 3Easy
104317Non-right Triangles: Law of Sines · Exercise 15Medium
104319Non-right Triangles: Law of Sines · Exercise 17Medium
104321Non-right Triangles: Law of Sines · Exercise 19Medium
104323Non-right Triangles: Law of Sines · Exercise 21Medium
104343Non-right Triangles: Law of Cosines · Try It 1Easy
104345Non-right Triangles: Law of Cosines · Try It 2Easy
104351Non-right Triangles: Law of Cosines · Exercise 3Easy
104353Non-right Triangles: Law of Cosines · Exercise 5Easy
104298Non-right Triangles: Law of Sines · Try It 2Easy
104300Non-right Triangles: Law of Sines · Try It 3Easy
104302Non-right Triangles: Law of Sines · Try It 4Easy
104307Non-right Triangles: Law of Sines · Exercise 5Easy
104309Non-right Triangles: Law of Sines · Exercise 7Medium
104311Non-right Triangles: Law of Sines · Exercise 9Medium
104313Non-right Triangles: Law of Sines · Exercise 11Medium
104315Non-right Triangles: Law of Sines · Exercise 13Medium
104325Non-right Triangles: Law of Sines · Exercise 23Medium
104327Non-right Triangles: Law of Sines · Exercise 25Medium
104329Non-right Triangles: Law of Sines · Exercise 27Medium
104331Non-right Triangles: Law of Sines · Exercise 29Medium
104334Non-right Triangles: Law of Sines · Exercise 67Medium
104336Non-right Triangles: Law of Sines · Exercise 69Medium
104338Non-right Triangles: Law of Sines · Exercise 71Medium
104340Non-right Triangles: Law of Sines · Exercise 73Medium
104341Non-right Triangles: Law of Sines · Exercise 75Medium
104347Non-right Triangles: Law of Cosines · Try It 3Easy
104348Non-right Triangles: Law of Cosines · Try It 4Easy
104349Non-right Triangles: Law of Cosines · Exercise 1Easy
104355Non-right Triangles: Law of Cosines · Exercise 7Medium
104357Non-right Triangles: Law of Cosines · Exercise 9Medium
104359Non-right Triangles: Law of Cosines · Exercise 11Medium
104361Non-right Triangles: Law of Cosines · Exercise 13Medium
104363Non-right Triangles: Law of Cosines · Exercise 15Medium
104365Non-right Triangles: Law of Cosines · Exercise 17Medium
104367Non-right Triangles: Law of Cosines · Exercise 19Medium
104369Non-right Triangles: Law of Cosines · Exercise 21Medium
104371Non-right Triangles: Law of Cosines · Exercise 23Medium
104373Non-right Triangles: Law of Cosines · Exercise 25Medium
104375Non-right Triangles: Law of Cosines · Exercise 27Medium
104377Non-right Triangles: Law of Cosines · Exercise 29Medium
104379Non-right Triangles: Law of Cosines · Exercise 31Medium
104381Non-right Triangles: Law of Cosines · Exercise 53Deep
104388Non-right Triangles: Law of Cosines · Exercise 69Medium
104392Non-right Triangles: Law of Cosines · Exercise 73Medium
104394Non-right Triangles: Law of Cosines · Exercise 75Medium
104396Non-right Triangles: Law of Cosines · Exercise 77Medium