Trigonometric Identities

  • There are various identities that can be proven regarding trigonmetric functions. In a right angled triangle …, and since … and …:
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  • In a right angled triangle … So: (Hcosθ)2 + (Hsinθ)2 = H2 (cosθ)2 + (sinθ)2 = 1
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Written by Sam Adam-Day.