Question

Given the equation Cos(x) = 1/4
I know that the one solution is 1.318 + 2kpi where k is an element of integers How do I find the other solution?

Answer 1

\[\cos(x)=\cos(-x)\]

Answer 2

do you remember this?

Answer 3

yes i understand cos is an even function

Answer 4

then you also understand this is a solution
\[-1.318+2kpi\]
?

Answer 5

well this is an approximation

Answer 6

the text book is giving me a value of4.97 +2kpi

Answer 7

oops one sec

Answer 8

sorry i had to go
yea there answer is fine
but my answer is also fine

Answer 9

i just used the fact that cos is even function

Answer 10

how did they get that answer?