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What's the following partial derivation:

Quote: Originally Posted by totalnewbie What's the following partial derivation: z = (sinx)^cosy, we want dz/dx. this means we treat y as a constant and differentiate with respect to x => dz/dx = cosy(sinx)^(cosy - 1) * (cosx) => dz/dx = cosxcosy(sinx)^(cosy - 1)