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( \cos(x)  +   \sec(x)) =    \frac{5}{2}  \\ ( { \cos(x) }^{2}  +  { \sec(x) }^{2}  =  (\cos(x) +  \sec(x) )  {}^{2}  \\  (\cos(x)  +  \sec(x) {}^{2}  =  ( \frac{5}{2}  ) {}^{2}  =  \frac{25}{4}

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