Formula for doing one language and one currency

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https://byjus.com/sin-cos-formulas/

https://chatgpt.com/share/67933f3d-546c-800a-85fa-6cd75a3d4fb8

sin²θ + cos²θ = 1.


tan2θ + 1 = sec2θ


cot2θ + 1 = cosec2θ


sin 2θ = 2 sin θ cos θ


cos 2θ = cos²θ – sin²θ


tan 2θ = 2 tan θ / (1 – tan²θ)


cot 2θ = (cot²θ – 1) / 2 cot θ


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