Question

f(x)=3cosx−cos^(3)x for 0 14 years ago

Answer 1

Hi jinnie :)
for x-intercept put f(x)=0 and solve for x.. That will be your answer.. :)
Good luck dear.. :)

Answer 2

i tried but im not getting the correct ans

Answer 3

don't worry. never give up.. :) math didn't create the human being. but human being created math. so just believe yourself and follow rules..
can you try that solution here ?

Answer 4

try factoring first

Answer 5

\[f(x)=3\cos x−\cos^3 x = \cos x (3 - \cos^2(x))
\]
One of the actors above can be zero. Which one?
Set it to zero and solve

Answer 6

factors not actors above

Answer 7

lol :D

Answer 8

yeah it still isnt working when it set it equal to zero