The discussion revolves around deriving Lagrange's Trig Identity, specifically focusing on the real part of a complex number expressed in exponential form. Participants are exploring the reasoning behind multiplying by a specific exponential factor in the context of this identity.
The discussion is ongoing, with participants seeking clarification on the multiplication step and expressing a need for more information to understand the problem better. Some have suggested sharing more details about their attempts to facilitate assistance.
One participant noted a rush during their initial explanation, indicating potential gaps in the information provided. There is a request for clearer communication of the problem being addressed.
You need to give us more information. I don't know what problem you're trying to solve.Lchan1 said:Homework Statement
I did the question with help, but did not understand why did we multiply e^-i(x/2)
How do I know what to multiply for getting the real part of a complex number in exponential form?
Homework Equations
The Attempt at a Solution