∵在Rt△ABC中,∠C=90°,AC=15,BC=8,
∴AB 2=AC 2+BC 2=289,
∴AB=17,
∴sinA=
BC
AB =
8
17 ,
cosA=
AC
AB =
15
17 ,
tanA=
BC
AC =
8
15 ,
cotA=
AC
BC =
15
8 .
∵在Rt△ABC中,∠C=90°,AC=15,BC=8,
∴AB 2=AC 2+BC 2=289,
∴AB=17,
∴sinA=
BC
AB =
8
17 ,
cosA=
AC
AB =
15
17 ,
tanA=
BC
AC =
8
15 ,
cotA=
AC
BC =
15
8 .