The function f is defined by f(x)=x2+1−cos(3x2−3). 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:
Q. The function f is defined by f(x)=x2+1−cos(3x2−3). 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:
Find Derivative: To find the equation of the tangent line at x=0.5, we first need to find the derivative of the function f(x), which will give us the slope of the tangent line at any point x. The derivative of f(x)=x2+1−cos(3x2−3) is f′(x)=2x+sin(3x2−3)⋅6x, using the chain rule for derivatives.
Evaluate at x=0.5: Now we need to evaluate the derivative at x=0.5 to find the slope of the tangent line at that point.f′(0.5)=2(0.5)+sin(3(0.5)2−3)⋅6(0.5)
Calculate f′(0.5): Calculating the value of f′(0.5) using a calculator and rounding to three decimal places: f′(0.5)=1+sin(3(0.25)−3)×3f′(0.5)=1+sin(0.75−3)×3f′(0.5)=1+sin(−2.25)×3f′(0.5)≈1+sin(−2.25)×3≈1−0.778×3≈1−2.334≈−1.334
Find y-coordinate: Next, we need to find the y-coordinate of the point on the graph of f(x) at x=0.5 to use it in the point-slope form of the equation of the tangent line.f(0.5)=(0.5)2+1−cos(3(0.5)2−3)
Calculate f(0.5): Calculating the value of f(0.5) using a calculator and rounding to three decimal places: f(0.5)=0.25+1−cos(3(0.25)−3)f(0.5)=1.25−cos(0.75−3)f(0.5)=1.25−cos(−2.25)f(0.5)≈1.25−cos(−2.25)≈1.25+0.778≈2.028
Use Point-Slope Form: Now we have the slope of the tangent line, m=−1.334, and a point on the tangent line, (0.5,2.028). We can use the point-slope form of the equation of a line, y−y1=m(x−x1), to write the equation of the tangent line.
Plug in Values: Plugging in the values into the point-slope form: y−2.028=−1.334(x−0.5)
Simplify Equation: Simplifying the equation to get it into slope-intercept form, y=mx+b:y=−1.334x+(−1.334×−0.5)+2.028y=−1.334x+0.667+2.028y=−1.334x+2.695
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