用计算器求下列各式的值:
(1)sin47°;
(2)sin12°30′;
(3)cos25°18′;
(4)tan44°59′59″;
(5)sin18°+cos55°﹣tan59°.
解:根据题意用计算器求出:
(1)sin47°=0.7314;
(2)sin12°30′=0.2164;
(3)cos25°18′=0.9003;
(4)tan44°59′59″=1.0000;
(5)sin18°+cos55°﹣tan59=﹣0.7817.
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