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The function 
f is defined by 
f(x)=x^(3)+2sin(3x-3). Use a calculator to write the equation of the line tangent to the graph of 
f when 
x=0.5. You should round all decimals to 3 places.
Answer:

The function f f is defined by f(x)=x3+2sin(3x3) f(x)=x^{3}+2 \sin (3 x-3) . Use a calculator to write the equation of the line tangent to the graph of f f when x=0.5 x=0.5 . You should round all decimals to 33 places.\newlineAnswer:

Full solution

Q. The function f f is defined by f(x)=x3+2sin(3x3) f(x)=x^{3}+2 \sin (3 x-3) . Use a calculator to write the equation of the line tangent to the graph of f f when x=0.5 x=0.5 . You should round all decimals to 33 places.\newlineAnswer:
  1. Calculate Derivative and Slope: To find the equation of the tangent line to the graph of the function at x=0.5x = 0.5, we first need to calculate the derivative of the function, which will give us the slope of the tangent line at that point.\newlineThe derivative of f(x)=x3+2sin(3x3)f(x) = x^3 + 2\sin(3x - 3) is f(x)=3x2+6cos(3x3)f'(x) = 3x^2 + 6\cos(3x - 3).\newlineNow we need to evaluate this derivative at x=0.5x = 0.5.
  2. Evaluate Derivative at x=0.5x = 0.5: Calculating the derivative at x=0.5x = 0.5 gives us f(0.5)=3(0.5)2+6cos(3(0.5)3)f'(0.5) = 3(0.5)^2 + 6\cos(3(0.5) - 3). This simplifies to f(0.5)=3(0.25)+6cos(1.53)f'(0.5) = 3(0.25) + 6\cos(1.5 - 3). Further simplifying, we get f(0.5)=0.75+6cos(1.5)f'(0.5) = 0.75 + 6\cos(-1.5). Using a calculator, we find cos(1.5)\cos(-1.5) and multiply it by 66, then add 0.750.75 to get the slope of the tangent line.
  3. Calculate Slope of Tangent Line: Using a calculator, cos(1.5)0.0707\cos(-1.5) \approx 0.0707 (rounded to four decimal places for intermediate calculation).\newlineNow we calculate 6×0.0707+0.756 \times 0.0707 + 0.75.\newlineThis gives us 0.4242+0.75=1.17420.4242 + 0.75 = 1.1742.\newlineSo, the slope of the tangent line at x=0.5x = 0.5 is approximately 1.1741.174 (rounded to three decimal places).
  4. Find y-coordinate at x=0.5x = 0.5: Next, we need to find the y-coordinate of the point on the graph of f(x)f(x) at x=0.5x = 0.5 to determine the point through which the tangent line passes.\newlineWe calculate f(0.5)=(0.5)3+2sin(3(0.5)3)f(0.5) = (0.5)^3 + 2\sin(3(0.5) - 3).\newlineThis simplifies to f(0.5)=0.125+2sin(1.53)f(0.5) = 0.125 + 2\sin(1.5 - 3).\newlineFurther simplifying, we get f(0.5)=0.125+2sin(1.5)f(0.5) = 0.125 + 2\sin(-1.5).\newlineUsing a calculator, we find sin(1.5)\sin(-1.5) and multiply it by 22, then add 0.1250.125 to get the y-coordinate.
  5. Calculate y-coordinate: Using a calculator, sin(1.5)0.9975\sin(-1.5) \approx -0.9975 (rounded to four decimal places for intermediate calculation).\newlineNow we calculate 2×(0.9975)+0.1252 \times (-0.9975) + 0.125.\newlineThis gives us 1.995+0.125=1.87-1.995 + 0.125 = -1.87.\newlineSo, the y-coordinate of the point on the graph of f(x)f(x) at x=0.5x = 0.5 is approximately 1.87-1.87 (rounded to two decimal places).
  6. Use Point-Slope Form: Now we have the slope of the tangent line m=1.174m = 1.174 and a point on the tangent line (0.5,1.87)(0.5, -1.87). We can use the point-slope form of the equation of a line to find the equation of the tangent line: yy1=m(xx1)y - y_1 = m(x - x_1). Plugging in our values, we get y(1.87)=1.174(x0.5)y - (-1.87) = 1.174(x - 0.5).
  7. Simplify Equation: Simplifying the equation, we get y+1.87=1.174x0.587y + 1.87 = 1.174x - 0.587. Then, we subtract 1.871.87 from both sides to get the final equation of the tangent line: y=1.174x0.5871.87y = 1.174x - 0.587 - 1.87.
  8. Final Tangent Line Equation: Combining like terms, we get y=1.174x2.457y = 1.174x - 2.457. This is the equation of the tangent line to the graph of f(x)f(x) at x=0.5x = 0.5, rounded to three decimal places.

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