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Find the value of 2∑k=0n[(nk)sin(kx)cos((n−k)x)]\Large2\sum_{k=0}^n \left[\binom nk \sin(kx)\cos\left((n-k)x\right)\right]2k=0∑n[(kn)sin(kx)cos((n−k)x)]
Here, take n=13n=13n=13 and x=1.467cx = 1.467^cx=1.467c radians.
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