Find an equation for the line tangent to the curve at the point defined by the given value of t. 12) x = t + cost, y = 2 - sin t, t= _ 12) A) y = - 0 18) A) na2 B) a2 C) 0 D) a2 Find the length of the curve. 19) The spiral r= e30, 0 = 0 s n 19) A) 72 (e67 - 1) B) V10 (e37t - 1) C) 8(712 - 1) D) e67 - 3 20) The curve r = 8v1 + sin 20, OsOs-4 20) A) 8(7 + 2) B) 8(7 + In(7 + 2)) C) 2n D) 27V2