a) find the value of sec k.
(b) deduce that cosk=√2−1
I don't get the right answer, if I rationalise the denominator by multiplying top and bottom by I still don't get
jashansinghal: your mistake is having the color tags inside of the math tags in LaTex...
Oh, you mean the problem?
I don't know why you got x = 1 from the quadratic. You need to use the quadratic formula.
Reject because secent of an angle cannot be in between -1 and 1.