11. Solve for all solutions to the equation 2cos (x) +3sin(x) -3 =0 in the range [0, 2x] 12. Find the slope of the secant line connection the two points on the function f(x) = x' with x-values 1 and 2. Also caluclate the y-intercept of this secant line and state the linear equation of the secant line in the form y = mx - b 13. Find the slope of the tangent line to the function f(x] = x at x = 2 using the limiting case of secant lines. Then find the linear equation of the tengent line in the form y = mx + b