Question

I need the question to solve​

Answer 1

Answer:

Step-by-step explanation:

See the attachment and Mark as brainliest

Answer 2

Answer:

Step-by-step explanation:

substitute a and b in the given equation and find magnitude of a+b and a-b

magnitude of a+b=sqrt a^2 +b^2+2abcostheta

magnitude of a-b=in the place of coefficient of cos theta you take -2ab

final eq comes to be cos omega t=1/2

omega t=cos inverse 1/2

omegat =pie/3

pie/6t=pie/3

t/6=1/3

=t=2

tow=2sec