Question

if vector r = vector p +vector q show that vector p× vector r =vector p×vector q​

Answer 1

Answer:

Answer is- 120

Explanation:

Let P=Q=R=AMagnitude of vectorR is|R|=(P^2+Q^2+2PQcosthita)where thita is angle between p and qA^2=A^2+A^2+2A^2costhitaCosthita=-1/2Thita=120*Hence angle between p and q is 120 degree