A Geometric Proof of Cosine Double Angle Identity.

A geometric proof of cosine double angle identity using "Inscribed Angle Theorem".

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Double Angle Identities:
Inscribed Angle Theorem:
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Music by Vincent Rubinetti
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Tool: Animations are made using an open-source python library, manim
Created by Grant Sanderson.
Manim Community Version.

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[davidepascu]

I like how you made clear what you were doing with the animation, congrats