\[1)\sin{110{^\circ}}\cos{140{^\circ}} < 0:\]
\[\sin{110{^\circ}} > 0;\ \ \ \cos{140{^\circ}} < 0.\]
\[2)\sin{80{^\circ}}\cos{100{^\circ}}\cos{148{^\circ}} > 0:\]
\[\sin{80{^\circ}} > 0;\ \ \ \]
\[\cos{100{^\circ}} < 0;\ \ \ \cos{148{^\circ}} < 0.\]
\[3)\sin{128{^\circ}}\cos^{2}{130{^\circ}}\text{tg}{92{^\circ}} < 0:\]
\[\sin{128{^\circ}} > 0;\ \ \text{tg}{92{^\circ}} < 0.\]
\[4)\sin{70{^\circ}}\cos{90{^\circ}}\text{tg}{104{^\circ}} = 0:\]
\[\cos{90{^\circ}} = 0.\]
\[5)\text{ctg}{100{^\circ}}\sin{114{^\circ}}\cos{11{^\circ}} < 0;\]
\[\text{ctg}{100{^\circ}} < 0;\ \ \ \sin{114{^\circ}} > 0;\ \ \ \]
\[\cos{11{^\circ}} > 0.\]
\[6)\cos{85{^\circ}}\sin{171{^\circ}}\text{ctg}{87{^\circ}} > 0;\]
\[\cos{85{^\circ}} > 0;\ \ \ \sin{171{^\circ}} > 0;\ \ \]
\[\text{ctg}{87{^\circ}} > 0.\]