用度表示下列各角.
(1)37°36″;
(2)51°6′;
(3)15°24′36″.
解:(1)37°36″=37°+(
)′
=37°+0.6′
=37°+(
)°
=37°+0.01°
=37.01°;
(2)51°6′=51°+(
)°
=51°+0.1°
=51.1°;
(3)15°24′36″=15°24′+(
)′
=15°24′+0.6′
=15°+24.6′
=15°+(
)°
=15°+0.41°
=15.41°.
分析:(1)把36″除以60化為分,然后再除以60化為度即可;
(2)把6′除以60化為度即可;
(3)把36″除以60化為分,再和24′加在一起除以60化為度即可.
點評:本題考查了度分秒的換算,根據(jù)度分秒是60進制,下一個單位化為上一個單位,除以60進行計算即可,比較簡單.