evaluate (7pi)/6 to nearest hundredth. Angle is given in radians.

Question

evaluate (7pi)/6 to nearest hundredth.  Angle is given in radians.

mertsj · Answer

Take 7 times 3.14 and divide by 6

anonymous · Answer

not right- answer should be -2

mertsj · Answer

Then you have posted something incorrectly

mertsj · Answer

Do you mean:
$$\csc \frac{7\pi}{6}$$

anonymous · Answer

csc is not on the paper

anonymous · Answer

am I suppose to assume it is csc

mertsj · Answer

I wouldn't think so.  Can you post a picture of the problem?

anonymous · Answer

don't know how but it is exactly like I entered

mertsj · Answer

Did this problem come from a book or a worksheet or where?  Because it is obviously the wrong problem  if its answer is -2.

anonymous · Answer

worksheet

mertsj · Answer

So your teacher left out the function.  Is that what you have been studying...values of the trig functions for various well-known angles from the special triangles and the unit circle?

anonymous · Answer

yep

mertsj · Answer

Well, we know that the sin of 7pi/6 is -1/2.  The csc is the reciprocal of the sin so the csc of 7pi/6 is -2.

anonymous · Answer

I orginally answered -0.5

mertsj · Answer

Based on what?

anonymous · Answer

so that is it-she left out csc.  thanks

anonymous · Answer

based on nothing

mertsj · Answer

yes.  And tell her that the problems are hard enough without trying to guess what the problem is!!!  LOL