Find an equation for the line tangent to the curve at the point defined by the given value of dy t. Also, find the value of at this point. dx x = 8 sint, y = 2 cost, t= - 7 The equation represents the line tangent to the curve at t = - (Type an exact answer, using radicals as needed.) The value of at t = is dx 4 (Type an exact answer, using radicals as needed.)