Compound Angle Formula Proof

Опубликовано: 16 Май 2026
на канале: Simple Science and Maths - Patrick Maye

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In this video I show you how to prove the trigonometry compound angle formula cos(A-B)=cosAcosB+sinAsinB. This is trigonometry formula 4 which must be known.

Credits:
Kevin MacLeod: Carefree

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