Find an equation of the tangent to the curve at the point corresponding to the given value of the parameter. x = cos(9) + sin(106), y = sin(6) + cos(109); 9 = O Find an equation of the tangent to the curve at the given point. x=3+t2t, y=t2+4, (3,5) Find a tangent vector of unit length at the point with the given value of the parameter t. r(t) = 2 sin(t)i + 7 cos(t)j t = 7r/6 i+ j