I put a vector sign over here, because you have to take the cross-product between the two, so you take the... sine of this Angle has to be taken into account.

在此加一个向量标志，因为必须要，算这俩的乘积，所以，sin这个角度必须，考虑在内。

youdao

I put a vector sign over here, because you have to take the cross-product between the two, so you take the... sine of this Angle has to be taken into account.

在此加一个向量标志，因为必须要，算这俩的乘积，所以，sin这个角度必须，考虑在内。

youdao