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sin^2(x) + cos^2(x) = 1 Trig Identity Graphical Proof
Graphical proof and derivation of the trigonometric identity sin^2x + cos^2x = 1 using the unit circle. The proof begins by constructing a triangle inside a unit circle such that the hypotenuse of the triangle is equal to the radius. Then using the Pythagorean theorem we can relate the sides of the triangle together into an equation. Lastly ...
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