Someone please answer :)

Fun interactive learning methods for memorization

Hurry: the angle measures associated with which set of ordered pairs share the same reference angle? (-square-root 3/2, 1/2) , (-1/2, -square-root 3/2) (1/2, -square-root 3/2) , (-square-root 3/2, 1/2) (-1/2, -square-root 3/2), (1/2, square-root 3/2) (square-root 3/2, 1/2) , (1/2, square-root 3/2)

Which of the following is not one of the seven points from the pre-start checklist recommended by the nsc

Sorry two big valves your rpm will go down plus the smaller ones will give you more horsepower your rpm will go up the answer is b