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Learn about Proof: sin- a+b = - cos a- sin b + - sin a- cos b Video
Khan Academy Presents: Proof of the trig identity sin(a+b) = (cos a)(sin b) + (sin a)(cos b)
Proof
Sin
Cos
Salman Khan
A+B
Knowledge
Mattie Hendriks
5min
Khan Academy
Education
5min
Educational Videos
Identity
Math
Math Lessons
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Mattie Hendriks
A+B
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