Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

The function 
f is defined by 
f(x)=x^(3)+2x+3sin(x^(2)+2). 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+2x+3sin(x2+2) f(x)=x^{3}+2 x+3 \sin \left(x^{2}+2\right) . 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+2x+3sin(x2+2) f(x)=x^{3}+2 x+3 \sin \left(x^{2}+2\right) . 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 of f(x)f(x): To find the equation of the tangent line at x=0.5x = -0.5, we first need to calculate the derivative of f(x)f(x), which will give us the slope of the tangent line at any point xx. The derivative of f(x)f(x) is f(x)=3x2+2+3cos(x2+2)2xf'(x) = 3x^2 + 2 + 3\cos(x^2 + 2) \cdot 2x (using the chain rule for the sine function).
  2. Evaluate Derivative at x=0.5x = -0.5: Now we need to evaluate the derivative at x=0.5x = -0.5 to find the slope of the tangent line at that point.\newlinef(0.5)=3(0.5)2+2+3cos((0.5)2+2)2(0.5)f'(-0.5) = 3(-0.5)^2 + 2 + 3\cos((-0.5)^2 + 2) \cdot 2(-0.5).
  3. Calculate cos(2.25)\cos(2.25): Using a calculator, we find that: f(0.5)=3(0.25)+2+3cos(0.25+2)×(1)=0.75+23cos(2.25)2.753cos(2.25)f'(-0.5) = 3(0.25) + 2 + 3\cos(0.25 + 2) \times (-1) = 0.75 + 2 - 3\cos(2.25) \approx 2.75 - 3\cos(2.25). Now we calculate the numerical value of cos(2.25)\cos(2.25) and then the entire expression.
  4. Find y-coordinate at x=0.5x = -0.5: Assuming the calculator gives us the value of cos(2.25)\cos(2.25) rounded to three decimal places, we get:\newlinecos(2.25)0.628\cos(2.25) \approx -0.628 (rounded to three decimal places).\newlineNow we substitute this value into the expression for f(0.5)f'(-0.5):\newlinef(0.5)2.753(0.628)2.75+1.8844.634.f'(-0.5) \approx 2.75 - 3(-0.628) \approx 2.75 + 1.884 \approx 4.634.\newlineSo, the slope of the tangent line at x=0.5x = -0.5 is approximately 4.6344.634.
  5. Use Point-Slope Form for Tangent Line: Next, we need to find the yy-coordinate of the point on the graph of f(x)f(x) at x=0.5x = -0.5 to use it in the point-slope form of the equation of the tangent line.\newlineWe calculate f(0.5)=(0.5)3+2(0.5)+3sin((0.5)2+2)f(-0.5) = (-0.5)^3 + 2(-0.5) + 3\sin((-0.5)^2 + 2).
  6. Simplify Equation to Slope-Intercept Form: Using a calculator, we find that:\newlinef(0.5)=0.1251+3sin(0.25+2)1.125+3sin(2.25)f(-0.5) = -0.125 - 1 + 3\sin(0.25 + 2) \approx -1.125 + 3\sin(2.25).\newlineNow we calculate the numerical value of sin(2.25)\sin(2.25) and then the entire expression.
  7. Calculate y-intercept: Assuming the calculator gives us the value of sin(2.25)\sin(2.25) rounded to three decimal places, we get:\newlinesin(2.25)0.781\sin(2.25) \approx 0.781 (rounded to three decimal places).\newlineNow we substitute this value into the expression for f(0.5)f(-0.5):\newlinef(0.5)1.125+3(0.781)1.125+2.3431.218.f(-0.5) \approx -1.125 + 3(0.781) \approx -1.125 + 2.343 \approx 1.218.\newlineSo, the y-coordinate of the point on the graph of f(x)f(x) at x=0.5x = -0.5 is approximately 1.2181.218.
  8. Calculate y-intercept: Assuming the calculator gives us the value of sin(2.25)\sin(2.25) rounded to three decimal places, we get:\newlinesin(2.25)0.781\sin(2.25) \approx 0.781 (rounded to three decimal places).\newlineNow we substitute this value into the expression for f(0.5)f(-0.5):\newlinef(0.5)1.125+3(0.781)1.125+2.3431.218.f(-0.5) \approx -1.125 + 3(0.781) \approx -1.125 + 2.343 \approx 1.218.\newlineSo, the y-coordinate of the point on the graph of f(x)f(x) at x=0.5x = -0.5 is approximately 1.2181.218.Now we have the slope of the tangent line (m4.634m \approx 4.634) and a point on the tangent line (0.5,1.218-0.5, 1.218). We can use the point-slope form of the equation of a line to write the equation of the tangent line:\newlineyy1=m(xx1)y - y_1 = m(x - x_1), where sin(2.25)0.781\sin(2.25) \approx 0.78100 is the point on the line.\newlineSubstituting the values we have, the equation becomes:\newlinesin(2.25)0.781\sin(2.25) \approx 0.78111.
  9. Calculate y-intercept: Assuming the calculator gives us the value of sin(2.25)\sin(2.25) rounded to three decimal places, we get:\newlinesin(2.25)0.781\sin(2.25) \approx 0.781 (rounded to three decimal places).\newlineNow we substitute this value into the expression for f(0.5)f(-0.5):\newlinef(0.5)1.125+3(0.781)1.125+2.3431.218.f(-0.5) \approx -1.125 + 3(0.781) \approx -1.125 + 2.343 \approx 1.218.\newlineSo, the y-coordinate of the point on the graph of f(x)f(x) at x=0.5x = -0.5 is approximately 1.2181.218.Now we have the slope of the tangent line (m4.634m \approx 4.634) and a point on the tangent line (0.5,1.218)(-0.5, 1.218). We can use the point-slope form of the equation of a line to write the equation of the tangent line:\newlineyy1=m(xx1)y - y_1 = m(x - x_1), where sin(2.25)0.781\sin(2.25) \approx 0.78100 is the point on the line.\newlineSubstituting the values we have, the equation becomes:\newlinesin(2.25)0.781\sin(2.25) \approx 0.78111.To write the equation in slope-intercept form (sin(2.25)0.781\sin(2.25) \approx 0.78122), we simplify the equation:\newlinesin(2.25)0.781\sin(2.25) \approx 0.78133
  10. Calculate y-intercept: Assuming the calculator gives us the value of sin(2.25)\sin(2.25) rounded to three decimal places, we get:\newlinesin(2.25)0.781\sin(2.25) \approx 0.781 (rounded to three decimal places).\newlineNow we substitute this value into the expression for f(0.5)f(-0.5):\newlinef(0.5)1.125+3(0.781)1.125+2.3431.218.f(-0.5) \approx -1.125 + 3(0.781) \approx -1.125 + 2.343 \approx 1.218.\newlineSo, the y-coordinate of the point on the graph of f(x)f(x) at x=0.5x = -0.5 is approximately 1.2181.218.Now we have the slope of the tangent line (m4.634m \approx 4.634) and a point on the tangent line (0.5,1.218-0.5, 1.218). We can use the point-slope form of the equation of a line to write the equation of the tangent line:\newlineyy1=m(xx1)y - y_1 = m(x - x_1), where sin(2.25)0.781\sin(2.25) \approx 0.78100 is the point on the line.\newlineSubstituting the values we have, the equation becomes:\newlinesin(2.25)0.781\sin(2.25) \approx 0.78111.To write the equation in slope-intercept form (sin(2.25)0.781\sin(2.25) \approx 0.78122), we simplify the equation:\newlinesin(2.25)0.781\sin(2.25) \approx 0.78133Finally, we calculate the y-intercept (sin(2.25)0.781\sin(2.25) \approx 0.78144):\newlinesin(2.25)0.781\sin(2.25) \approx 0.78155\newlineSo, the equation of the tangent line is:\newlinesin(2.25)0.781\sin(2.25) \approx 0.78166, rounded to three decimal places.

More problems from Find equations of tangent lines using limits