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Lena772
 one year ago
(a) find an equation of the tangent line to
the graph of at the given point, (b) use a graphing utility to graph the function and its tangent line at the point, and (c) use the derivative feature of the graphing utility to confirm your
results.
Lena772
 one year ago
(a) find an equation of the tangent line to the graph of at the given point, (b) use a graphing utility to graph the function and its tangent line at the point, and (c) use the derivative feature of the graphing utility to confirm your results.

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Lena772
 one year ago
Best ResponseYou've already chosen the best response.1function: y= cos 3x point: (pi/4, sqrt2/2)

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1i saw u doing a similar problem the other day ? :)

Lena772
 one year ago
Best ResponseYou've already chosen the best response.1I just get confused when trig is added in

Decart
 one year ago
Best ResponseYou've already chosen the best response.0do you know what the derivative is

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1so, slope = m = dy/dx = 3sin3x

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1since u want the slope at point: (pi/4, sqrt2/2) evaluate slope at x = pi/4

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1dy/dx at x = pi/4 : 3sin(3*pi/4) = ?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1that doesnt look right you should get : dy/dx at x = pi/4 : 3sin(3*pi/4) = \(\large \frac{3}{\sqrt{2}}\)

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1now that u knw slope, m = \(\large \frac{3}{\sqrt{2}}\) point: (pi/4, sqrt2/2) wats the equation of tangent in point slope form ?

Lena772
 one year ago
Best ResponseYou've already chosen the best response.1y(sqrt2/3)=(3/sqrt2)(x(pi/4)

Lena772
 one year ago
Best ResponseYou've already chosen the best response.1So that's for a? What would the graph look like for b? Do I just put that equation into Geogebra?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1yup graph all 3 below : 1) function: y= cos 3x 2) point: (pi/4, sqrt2/2) 3) tangent : y(sqrt2/\(\color{red}{2}\))=(3/sqrt2)(x(pi/4)

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1u should get exactly like the one attached
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