Question

r=√a^2+b^2 representing the magnitude of a vector in quadrand lies​

Answer 1

Answer:

From given definition

A

=2cos60

i

^

+2sin60

j

^

B

=2cos(−60)

i

^

+2sin(−60)

j

^

=2cos60

i

^

−2sin60

j

^

A

+

B

=2×2cos60

i

^

+0

j

^

=4.

2

1

i

^

=2

i

^

∣

∣

∣

∣

A

+

B

∣

∣

∣

∣

=2.