What is the result of the Pythagorean identity sin²(θ) + cos²(θ)?
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This identity is derived from the Pythagorean theorem applied to the unit circle. Dividing this identity by cos²(θ) yields the related identity 1 + tan²(θ) = sec²(θ).
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- According to the Pythagorean identity, what does sin²(θ) + cos²(θ) equal?