Evaluate trigonometric function of angle A

[xxMsJojoxx]

How do I calculate sec A? The answer is supposed to be . But I have no idea how to get this?
I tried:
But got a completely different asnwer?

Please help!

 

[pka]

View attachment 22442How do I calculate sec A? The answer is supposed to be View attachment 22443. But I have no idea how to get this?
I tried:
View attachment 22444 But got a completely different asnwer? Please help!

The \(\sec(A)=\dfrac{1}{\cos(A)}\). But \(\cos(A)=\dfrac{4}{\sqrt{116}}=\dfrac{2}{\sqrt{29}}\)

 

[Deleted member 4993]

View attachment 22442
How do I calculate sec A? The answer is supposed to be View attachment 22443. But I have no idea how to get this?
I tried:
View attachment 22444 But got a completely different asnwer?

Please help!

sec (A) = hyp./adj.

= [√116]/4

=[√(29*4)]/4

=[2* √(29)]/4

=[√29]/2