Find an Online Tutor Now

Asked • 12/14/19

Solve cos x = -2/3 for 0 ≤ x < 2π (round to the nearest hundredth of a radian)

I received the values 131.81 and 228.209 which is incorrect. I've tried to come up with the correct answer multiple times. Solve cos x = -2/3 for 0 ≤ x < 2π (round to the nearest hundredth of a radian). Thanks for your help!

Mark M.

The measure your give are in degrees (and correct), yet the problem asks for radians.
Report

12/14/19

Carla J.

131.81 is 2.3 in radians and 228.209 is 3.9 in radians. How would I know where they are located in the four quadrants, would I use a trig circle?
Report

12/14/19

1 Expert Answer

By:

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.