7. If y = 2 sinx - cos x, find y" at * = a. 1 + 13 C. 1- 2-53 b. 1 - 13 2 d. 1+213 2 8. Ify = - sin 3x , find y" at x = . a. 1 b. -1 d. $2 9. Find the slope of the tangent to y = 1 - 2 sin x at the point where x a. b . C. d. 2 -2 10. If A(x) = sin 3x, find f" a. 3 C. 9 b. - 3 d. 11. If A(x) = cos(nx) - sin? (nx), find a. -8/3 C. 8n3 b. -8 d. -An2 12. Find f'(x) if f(x) = 2e*. a. 20* e In 2 b. d. 2e 13. Find the equation of the tangent to y = e asinat the point (0, 1). a. y = x+* c. y = ex + 1 b. y=-x-1 d. y = x+1 14. If f(x) = 2x e", find f'(1). a. 2e C . 0 d. 4e b. be 15. Find the equation of the tangent to y = 30* + 3ex that is parallel to y = 6ex + 5. C. 6ex - y = be a. 6ex- y = 0 d. bex+ y = 68 b. 6ex+ y = 0