x + cosx = 1 what does x equal?

Question

see above. im pretty sure its 1 buuut just to make sure..

Answer 1

No. But 0 is a solution. 0 + cos(0) = 0 + 1 = 1.

Let's analyse if there's another solution. Put f(x) - x + cos(x). Then, f'(x) = 1 - sin(x) >=0 for every x. . We have f'(x) = 0 whenever sin(x) =1, that is, when x = 2kpi + pi/2. But these points are not extermum points, because f' doesn't change from positive to negative, we have f'(x) >=0 for every x. So, f is increasing, so that f vanishes if and only if x = 0. No other solutio,

Answer 2

it is 1

Answer 3

The value of cos0 is 1. So if we suppose X is 0, then X +cosx=0+cos0=0+1=1
Therefore the value of X is 0 and not 1.

Answer 4

i think zero, because cos0=1 then according to question
if you put x=0 then
0 + cos 0 = 1

Answer 5

zero.

Cos(0) = 1.

So, 0 + Cos(0) = 1.

Answer 6

i don't know I'm only in grade 8

Answer 7

zero