Whats 1 + 1 (wrong answers only)

Ideally, the backrest is tilted back slightly, so when you turn the wheel your shoulders are the seat.

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 types of stars had the smallest initial mass? which of the following types of stars had the smallest initial mass?