Question

Use a calculator to find the value of each expression rounded to two decimal places. Make sure you are in Radian Mode.

cos-(0.75)

Answer 1

Your answer

Cos(-0.75) = 0.9999

Answer 2

If you meant to write
`\cos^(-1)(0.75)`, then using a calculator in radian mode would show
`\cos^(-1)(0.75) \approx 0.722734`

Rounding to the nearest hundredth gets us
`\cos^(-1)(0.75) \approx 0.72`