The vector Rbar = 10i cap + 10j cap. The frame of reference is changed by 30degree anticlockwise. Represent the vector in New coordinate system. Plz answer with steps

The total length of vector os 10 times squaeroot of 2... Now it is inclined at equal angles to both the x axis and y axis that is 45 degrees.. If you turn it 30 degrees in anticlockwise... It will be inclined at 15 degrees to the x axis and at75 degrees to the y axis now resolve the vector into its components