Question

At x =π, an equation of the line tangent to the graph of fx=cos1/2x is

Answer 1

y = f'(pi)x -f'(pi)pi+f(pi)

Answer 2

what is the answer then

Answer 3

what is f'(x) ?

Answer 4

f'x is 0

Answer 5

no

Answer 6

the derivative of cos(1/2 x) is not 0 :)

Answer 7

if this is base on a Essay then copy what @amistre said or if this is a choice question try to find the answer the match in his/hers answer. :)

Answer 8

-1/2 sin 1/2x

Answer 9

right; and when we pi into that we get: -1/2 sin(90) = -1/2 i beleive for our slope

Answer 10

y = -1/2 x + (1/2)*pi + f(pi)

what is cos(pi/2)?

Answer 11

y=1/2x + -1/2pi

Answer 12

thats seems right to me; or to clean it up

\[y=-\frac{1}{2}+\frac{pi}{2}\]

Answer 13

\[y=-\frac{1}{2}x+\frac{pi}{2}\]

Answer 14

thanks amistre64

Answer 15

youre welcome :) good luck