Statics (2) The method of direct projection From the fig we see X=F cos a Y=FCOS B F Z=F·cosy (3) The method of indirect projection When the angles a, B and y are not easy to determine we can project F onto the plane xy firstly and then project the result f onto the axes x and y X-Fsin r cos=F. COS=.coSB- coso Y=FSiny.sin=Frv.sin=Fcose. sin z=F·cosy=Fsnb9 (2) The method of direct projection From the fig we see g   cos cos , cos , =  =  =  Z F Y F X F X =Fsing cos =Fxy cos =Fcos cos Y =Fsing sin =Fxy sin =Fcos sin Z =Fcosg =Fsin (3) The method of indirect projection When the angles ,  and g are not easy to determine we can project F onto the plane xy firstly and then project the result Fxy onto the axes x and y