Question

If vector a vector b and vector c are mutually perpendicular vectors then what is the value of vector a ( vector b + vector c )

Answer 1

Answer:

a=sqrt{b^2+c^2}

Explanation:

resulant if two vector is given by

R=sqrt{A^2+B^2+2ABcos\thita}

in case if b and c is 90 so cos90=0

so

a=sqrt{b^2+c^2+2bc cos90)

a=sqrt{b^2+c^2+0}

so

a=sqrt{b^2+c^2}