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List all Trigonometric Identities for class X |
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Answer» Reciprocal IdentitiesSin θ = 1/Csc θ or Csc θ = 1/Sin θCos θ = 1/Sec θ or Sec θ = 1/Cos θTan θ = 1/Cot θ or Cot θ = 1/Tan θPythagorean Identitiessin2 a + cos2 a = 11+tan2 a = sec2 acosec2 a = 1 + cot2 aRatio IdentitiesTan θ = Sin θ/Cos θCot θ = Cos θ/Sin θOpposite Angle IdentitiesSin (-θ) = – Sin θCos (-θ) = Cos θTan (-θ) = – Tan θCot (-θ) = – Cot θSec (-θ) = Sec θCsc (-θ) = -Csc θComplementary Angles IdentitiesSin (90 – θ) = Cos θCos (90 – θ) = Sin θTan (90 – θ) = Cot θCot ( 90 – θ) = Tan θSec (90 – θ) = Csc θCsc (90 – θ) = Sec θ Sin² x+cos²x=1Cosec²x-cot²x=1Tan²x-sec²x=1 |
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