Ireally need with these problems i don't understand it. can someone ?

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Rewrite the expression in z to the n power. the expression i was given is: 1 over z to the negative 1 half power.