6. Use the triangle method to find tan(cos ' (x)) 7. Expand In * sin x Vx2 +1 8. Solve for x: In 2 + In x = 4 9. Solve for x: e2x - 3e* - 28 =0 10. Use the graph at the right to answer each a) lim f(x) = x -+ 2 - b) lim f(x) X -> 2 +1. f(x) = -(x+3)2 -2 2. f(x) = - -1 (x- 2)2 2+3 3. Given f(x) = _ 3x -, find f-'(x) x+ 4' 4. Prove that your answer to #3 is correct by showing fo f (x) = xand flo f(x) =x (d 5. Find the exact value of sin 0 if 0 = tan" (2/3)