Question

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

Answer 1

Answer:

see explanation

Step-by-step 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 = $\frac{5}{4}$ = 1.25 which is greater than 1 , thus calculator will return ' error'

Answer 2

Step-by-step explanation:

because the is no answer for that in the calculator