Question

find magnitude and direction of a vector A=(6i-8j)​

Answer 1

Answer:

ccccc I don't known......

Answer 2

Answer:

1st way

Given that...

a=4i-3j

b=6i+8j

so

a+b=(4i-3j)+(6i+8j)

a+b=10i+5j

so magnitude of a+b

=√(10^2+5^2)

=√(100+25)

=√(125)

=5√5

The vector a+b=10i+5j

by the diagram..

tan @=1/2

or

@=tan^-1(1/2)

so vector will make angle tan^-1(1/2) with positive x-axis

Explanation:

2nd way in 2nd image

I hope it's helpful