Guest

If 0.4i+0.7j+ak is a unit vector then value of a is...

If 0.4i+0.7j+ak is a unit vector then value of a is...

Grade:11

1 Answers

Debolina Sarkar
29 Points
5 years ago
Let the vector equation isp=0.4i+0.7j+akAccording to the question the p vector is an unit vector so|p|=|0.4i+0.7j+ak|=1Therefore,√{(0.4)^2+(0.7)^2+a^2}=1or,√(0.16+0.49+a^2)=1or,0.65+a^2=1or,a=√0.35

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free