Oh, that is pure ****

[alkatran]

I had a math test where we had to prove a trig identity, among other things. Before hand, our teacher told us if he asked a question like that, the identity was TRUE, and we didn't have to check it first (with a graphic calculator).

Now, one of the identities was wrong, and after wasting 10 minutes on in, I checked it on the calculator, saw it was false, and wrote "FALSE" write over it.

Anyways, after he gives me 0 on the problem, I talk to him about it and he gives me 4 (out of 5).

His reason for not giving me the extra point is that I proved him wrong. Ya, you read it right, he's taking a point out of spite.


Discuss.

[DiGiTaIErRoR]

I think you mean graphing calculator -not graphic.

Spite that!

[twanvl]

Are you sure it was not an error by the calcualtor? Do you remember formula?

[TheManWhoCan]

Sounds like he has a sense of humour!

[alkatran]

I double-checked it, the teacher checked it. I found the error in his work, I showed him where I did the same work but noticed the problem.

The problem basicly broke down to 2 = 0, here it is:

sec - 1 - cos - 1 = 0
sec + 1 | cos + 1

I edited this like 10 times... it better be right this time.