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Where does the Pythagorean Identity sin^2 Θ + cos^2 Θ = 1 come from? How does it relate to right triangles?

Where does the Pythagorean Identity sin^2 Θ + cos^2 Θ = 1 come from? How does it relate to right triangles?
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Where does the Pythagorean Identity sin^2 Θ + cos^2 Θ = 1 come from? How does it relate to right triangles?

User Andrew Khosravian
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as image shows. imagine unit circle
Where does the Pythagorean Identity sin^2 Θ + cos^2 Θ = 1 come from? How does it relate-example-1
User Scott Wales
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