Question

how do i convert cos 1/4 into radians

Answer 1

You don't have to convert anything.
Just look up (or enter in your calculator) the cosine of 1/4 in radians.

Answer 2

Actually the cosine of 1/4 is just a ratio and NOT an angle.
You could look up the cosine of 1/4 radians and it is 0.96891

Answer 3

ok but to find all angles of sec(t)=4 i need a radian measure plus my 2pie k where k is an integer

Answer 4

herein is my problem for i've found the cos value to be the 1/4

Answer 5

If you have a cosine value of .25 and want to know the angle then you want the acrcosine
the arc cosine of .25 = 75.522 Degrees
the arc cosine of .25 = 1.3181 Radians

Answer 6

wow thats very informative thank you.