7. Find the equation of the tangent line to the graph at the indicated point. 41. f(x) = tan 2x; (1/2, 7 / 4) 42. f(x) = sin -1 -; (2, 7 /6) 43. f(x) = cos-1x2; (1/ V2, T/3) 44. f(x) = sec-'(e"); (In 2, 17 / 3)