‎In this work, we find the differential transforms of the functions $\tan$ and‎ ‎$\sec$‎, ‎and then we applied this transform on a class of partial differential equations involving $\tan$ and‎ ‎$\sec$‎.
‎In this work, we find the differential transforms of the functions $\tan$ and‎ ‎$\sec$‎, ‎and then we applied this transform on a class of partial differential equations involving $\tan$ and‎ ‎$\sec$‎.
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