Show that the area of the triangle contained between the vectors a and b is one half of the magnitude of a × b. | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-7 System Of Particles And Rotational Motion



Q.4:- Show that the area of the triangle contained between the vectors a and b is one half of the magnitude of a × b.

 

Answer:-

Consider two vectors OK = vector |a| and OM = vector |b|, inclined at an angle θ, as shown in the following figure.