计算:cot44°•cot45°•cot46°=______.
计算:57.32°=______度______分______秒.
计算:sin30°+cos60°+tan45°=______.
计算:sin260°+cos60°-tan45°=______.
计算:33°18′=______°.
计算:33°52′+21°54′=______度______分.
3.76°=______度 ______分 ______秒.
计算:sin10°cos20°sin30°cos40°=______.
计算:78°46′14″-36°50′=______.
计算:153°19′42″+26°40′28″=______.
计算:48°39′+67°31′=______.
计算23°53′×3+107°43′÷5=______.
计算:108°18′-56°23′=______.