Question

Cross product A cross B = ABsinx become max when x= 90 degree. Why

Answer 1

Dear student,

$$\begin{gathered} A\times B=\left|A\right|\left|B\right|\sin x \\ asweknow\sin xismaximumatx=90°andminimumatx=270° \\ \sin 90°=1and\sin 270°=-1 \\ HencevalueofA\times B=\left|A\right|\left|B\right|\sin 90=\left|A\right|\left|B\right|whichismaximum \end{gathered}$$

Regards