—Sorry. This is not _______________. It's Lily's.
A:my
B:mine
C:her
D:yours
如果向东走80m记为+80m,那么向西走60m记为 ( )
已知∠A为锐角,求满足下列条件的∠A度数.
(1)sinA=0.9816;
(2)tanA=0.1890.
如图,在△ABC中,∠C=90°,AB=5,BC=3,则cosA的值是( )