1.

\left. \begin{array} { l } { \operatorname { cos } 45 ^ { \circ } } \\ { \operatorname { sec } 30 ^ { \circ } + \operatorname { cosec } 30 ^ { \circ } } \\ { \frac { 5 \operatorname { cos } ^ { 2 } 60 ^ { \circ } + 4 \operatorname { sec } ^ { 2 } 30 ^ { \circ } - \operatorname { tan } ^ { 2 } 45 ^ { \circ } } { \operatorname { sin } ^ { 2 } 30 ^ { \circ } + \operatorname { cos } ^ { 2 } 30 ^ { \circ } } } \end{array} \right.

Answer»

the answer is wrong



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