π弧度化为度数是

∵1弧度=(180 π )°∴π 6 弧度=π 6 *(180 π )°=30°.故选A.

7/12*180=105选D

3/5π=3/5x180=108° 度化弧度除以180再乘以π即可.满意请采纳.

1度=π/180弧度( ≈0.017453弧度 ) 一个圆是360度,2π弧度例如:90°=90*π/180 =π/2 弧度 60°=60*π/180 =π/3 弧度 45°=45*π/180 =π/4 弧度 30°=30*π/180 =π/6 弧度 120

化弧度是用度数除以180,因为π表示180°所以:60°=π/3 90° =π/245°=π/4 30°=π/6 135°=3π/4 120°=2π/3-30° =-π/6-60°=-π/3 -45°=-π/4 -90°=-π/2 -180°=-π -270°=-3π/2

105°

.8派/5弧度=8*180°/5=288°

弧度化角度乘以180°/π 即-450° 望采纳!

1°=π/180rad