Well, when you get the correct answer, you should quit. Why are you still streesing over it?

Would you be happier with

Maybe you were expecting the answer in degrees? 133.433 deg

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If you are thinking about x as being an angle ("cosine" is a function- just because you talk about cos(x) it does not necessarily mean that x is and angle) then x= 2.3288...

**radians**.

Since radians corresponds to 180 degrees, 2.3288 radians= 2.3288 (180/3.14159)= 133.433... degrees.