已知在角ABC中,∠C=90度,AB=6
(1)若∠A=30,求BC和AC的长;
∵角ABC中,∠C=90度,AB=6
∴BC=AB*sin30°=6*1/2=3
.AC=AB*cos30°=6*√3/2=3√3
(2)若∠A=45度,
∴BC=AB*sin45°=6*√2/2=3*√2
AC=AB*cos45°=6*√2/2=3√/2
.
已知在角ABC中,∠C=90度,AB=6
(1)若∠A=30,求BC和AC的长;
∵角ABC中,∠C=90度,AB=6
∴BC=AB*sin30°=6*1/2=3
.AC=AB*cos30°=6*√3/2=3√3
(2)若∠A=45度,
∴BC=AB*sin45°=6*√2/2=3*√2
AC=AB*cos45°=6*√2/2=3√/2
.