Use algebra and identities to smplify the expression 1. ( 5cost/sin²t ) x (sin²t - sintcost / sin²t - cos²t ) 2 Find the radian of measure of an angle in standard position that has measure between 0 and 2π ; and is coterminal with the angle in standard psoition whose measure is given a) -3 π/4 randians b) 45 π/8 radians