sinacosa=1/2,tana+cosa/sina的值
问题描述:
sinacosa=1/2,tana+cosa/sina的值
答
tana + cosa/sina = sina/cosa + cosa/sina = (sina^2 + cosa^2) / sinacosa = 1/sinacosa = 2
sinacosa=1/2,tana+cosa/sina的值
tana + cosa/sina = sina/cosa + cosa/sina = (sina^2 + cosa^2) / sinacosa = 1/sinacosa = 2