cot Ɵ= .9317
It's looking for two angles in radians, so I put it in to my calculator and got 0.821 (which is one of the answers). The other answer is supposed to be 3.96, except I'm not sure how to get it. Please help!

Question

cot Ɵ= .9317
It's looking for two angles in radians, so I put it in to my calculator and got 0.821 (which is one of the answers). The other answer is supposed to be 3.96, except I'm not sure how to get it. Please help!

anonymous · Answer

Do you have a graphing calculator? Graph cot(x). Notice that the graph repeats in increments of pi. This means that cot will have the same value at 0.821 + pi. And if you subtract, you'll find 3.96 - 0.821 is pi. In fact, you could add pi to 3.96 and have another answer. Add it again and you'll have another, etc (though the question obviously only wants your answer from 0 to 2pi).