sin30°9’等于多少
问题描述:
sin30°9’等于多少
(1)sin30°9’ (2)cos56'25" (3)tan73°26' (4)cot55°15' 等于多少?(1)cosa=0.3264 (2)cota=1.3260 (精确到1”)
1)sin30°9’ (2)cos56'25" (3)tan73°26' (4)cot55°15' 等于多少?(精确到0.0001) (1)cosa=0.3264 (2)cota=1.3260 (精确到1”)
答
(1)sin30°9’=0.5023
(2)cos56'25"=0.531
(3)tan73°26'=3.3616
(4)cot55°15'=0.9913
(1)cosa=0.3264 ,a=71
(2)cota=1.3260 ,a=37