Question

Explain why my calculator gives an error when you enter cos^-1 (5/4)

Answer 1

Explanation:

because the is no answer for that in the calculator

Answer 2

see explanation

Explanation:

To obtain a solution for
`cos^(-1)` (x) , then

- 1 ≤ x ≤ 1

That is the value of x cannot be greater than 1 or less than - 1

here x =
`(5)/(4)` = 1.25 which is greater than 1 , thus calculator will return ' error'