sin(-930°)怎么算?

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sin(-930°)怎么算?sin(-930°)怎么算?sin(-930°)怎么算?sin(-930°)=sin(-930°+1080°)=sin(150°)=sin(180°-30°)=sin30°

sin(-930°)怎么算?
sin(-930°)怎么算?

sin(-930°)怎么算?
sin(-930°)
=sin(-930°+1080°)
=sin(150°)
=sin(180°-30°)
=sin30°
=1/2

sin(-930°)
=sin(3×360°-930°)
=sin150°
=1/2