Which trigonometric identity states that for any angle theta, the square of the sine plus the square of the cosine equals one?
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Pythagorean Identity
The Pythagorean Identity (sin²θ + cos²θ = 1) is a direct consequence of the Pythagorean theorem applied to the unit circle. It serves as the foundation for deriving many other identities, including those for secant and tangent.
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- What name is given to the identity sin²θ + cos²θ = 1?