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LBRY Claims • proof-cos-a-b-cos-a-cos-b-sin-a-sin-b

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Created On
20 Feb 2019 14:08:06 UTC
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Proof: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)
Proof of the trig identity: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)
https://www.youtube.com/watch?v=V3-xCPDzQ1Q
Author
Content Type
Khan Academy
video/mp4
Language
English
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