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

Question

asked Jan 6, 2023 33.3k views

2 Answers

Greenisha · Answer 1 · 2023-01-11T23:21:45+0000

Answer:

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'