Evaluate the expression using a calculator. Express your answer in radians, rounding to two decimal places. cos ⁡ − 1 ( 1 4 ) \cos^{-1}\left(\frac14\right) cos − 1 ( 4 1 )

this problem, we're asked to evaluate the expression using a calculator. We then want to express our answer in radians rounding to 2 decimal places. Now, the expression that we're given here is the inverse cosine of 1 fourth. Now before you type anything into your calculator, make sure you are in the correct mode. Because we want to express our answer in radians, you should be in radian mode and not degree mode. Now in order to type this into your calculator, you're going to press the second button and then your corresponding trig function, in this case, cosine, in order to get the inverse cosine. Then you just type in the value, which in this case is 1 fourth, so second cosine and then 1 fourth in order to get your final answer here. Now rounded to 2 decimal places, you should get 1.32 as your solution, and we're done here. Thanks so much for watching, and I'll see you in the next one.