b. Trigonometric Identities

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E5-01 [Trigonometric Identities: Proving tanθ = sinθ / cosθ]

E5-02 [Trigonometric Identities: Proving sin^2 θ + cos^2 θ = 1]

E5-03 [Trigonometric Identities: Simplifying Expressions]

E5-04 [Trigonometric Identities: arcsin(x) = arccos(y)]