sina=0.3286 19°11'1.76''
cosa=0.7143 44°24'50.9''
tana=0.2936 16°21'44.06''
tana=128.68 89°33'17.1''
一直锐角三角函数值,求相应的锐角值,精确到1′
sina=0.3286 19°11'1.76''
cosa=0.7143 44°24'50.9''
tana=0.2936 16°21'44.06''
tana=128.68 89°33'17.1''