Prove sin(a+b)sin(a-b)=sin^2a-sin^2b

Name: Prove sin(a+b)sin(a-b)=sin^2a-sin^2b
Uploaded: 2016-03-04T12:32:36+00:00
Duration: 4 min 54 s
Channel: Svtuition
Description: If you know that sin (a+b) will sina cosb + cosa sinb and sin(a-b) will be sina cosb - cosa sinb, this to prove the equation will not be difficult. You should know also cos^2 = (1-sin^2)

Svtuition

If you know that sin (a+b) will sina cosb + cosa sinb and sin(a-b) will be sina cosb - cosa sinb, this to prove the equation will not be difficult.  You should know also cos^2 = (1-sin^2)

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