Sin30°30′的近似值如何计算?
问题描述：
Sin30°30′的近似值如何计算?
答
sin (30o30') =sin(30d+30') = sin30d cos30' + sin30' cos30d 30'非常小,所以sin30' = 30' = 0.5*pai/180 = 0.00873,cos 30' = 1sin30d30' = sin30d + sin30' cos 30d = 0.5 + 0.00873* 1.732/2 = 0.50756