Prove the Pythagorean Identity \( \cos^2\theta + \sin^2\theta = 1 \)

Trigonometric Identity: Using Pythagorean Theorem for sin^2(θ) + cos^2(θ) = 1

Prove the Identity sin^2(x) + cos^2(x) = 1 Using Pythagorean Theorem and Unit Circle

Proving the Trigonometric Identity sin^2x + cos^2x = 1 Using the Unit Circle

Prove Trigonometric Identities Involving Sine, Cosine, and Tangent