1.8sinπ/48·cosπ/48=8*1/2sinπ/24,sinπ/24cosπ/24=1/2sinπ/12,
sinπ/12cosπ/12=1/2sinπ/6,所以原式=
8*1/2*1/2*1/2sinπ/6=sinπ/6
化简下列各式.（1）8sinπ/48·cosπ/48·cosπ/24·cosπ/12；（2）cos36°·cos72°.
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