Trigonometry Identities<br />sin2θ+cos2θ≡1<br />sec2θ-tan2θ≡1<br />1+cot2θ≡cosec2θ<br />tanθ=sinθcosθ<br />cotθ=1tanθ=cosθsinθ<br />secθ=1cosθ<br />cosecθ=1sinθ<br />cos90-θ=sinθ<br />sin90-θ=cosθ<br />tan90-θ=1tanθ<br />

Trigonometry Identities

  • 1.
    Trigonometry Identities<br />sin2θ+cos2θ≡1<br/>sec2θ-tan2θ≡1<br />1+cot2θ≡cosec2θ<br />tanθ=sinθcosθ<br />cotθ=1tanθ=cosθsinθ<br />secθ=1cosθ<br />cosecθ=1sinθ<br />cos90-θ=sinθ<br />sin90-θ=cosθ<br />tan90-θ=1tanθ<br />