Hello!

I came across a question to prove:

I did it geometrically but the method was fairly long (but it worked). I got told that I could have done it using complex numbers.

How would I do that? Thanks in advance. (Smile)

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- Jul 20th 2008, 03:02 AMSimplicityCompound Angle Formula Proof [sin(A+B)]
Hello!

I came across a question to prove:

I did it geometrically but the method was fairly long (but it worked). I got told that I could have done it using complex numbers.

How would I do that? Thanks in advance. (Smile) - Jul 20th 2008, 04:24 AMkalagota

just solve both sides, by transforming each to trigonometric form..