Calculate 2 f by Eq. (3). Check by direct differentiation. Indicate when (3) is simpler. Show
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Calculate ∇2f by Eq. (3). Check by direct differentiation. Indicate when (3) is simpler. Show the details of your work.
f = cos2 x + sin2 y
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2f 2cos2xcos2y 2sin2xsin2y Direct ...View the full answer
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