Question: Isolating a constant in a function when y(0)=1

Hi,

I have the following function:

y(t) = _C1*exp(-2*t)*sin(6*t)+_C2*exp(-2*t)*cos(6*t)

My start parameters are y(0)=1, and y'(0)=2

How do I isolate _C1 when y(0)=1?

 

Thanks in advance

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