Question

Given cos A = .25 find angle A in degrees. Round your answer to the nearest hundredth.
A. 34.12°
B. 123.98°
C. 56.78°
D. 75.52°

Answer 1

You take the inverse cos function \[cos^{-1}\] If you Google scientific calculator online there a calculator that has these functions on them.

Answer 2

yup,
\[\cos^{-1} (.25)\]
will give you one of those four answers...

Answer 3

thank you ehuman !!!!!

Answer 4

you bet

Answer 5

cos examines an angle and gives you a ratio
inverse cos examines a ratio and gives you an angle.