Find the equations of the tangent lines at the point where the curve crosses itself. (Write your answers as a comma-separated list of equations.) x = 2 − πcost
y = 2t − π sint
−π ≤ t < π

Find the arc length of the curve on the given interval.

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244