Please help.

1) .........(Jhevon says: what?)

2)

3)

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- April 27th 2009, 08:27 PMdonnyBSome trig questions part 1
Please help.

1) .........(Jhevon says: what?)

2)

3) - April 27th 2009, 09:15 PMSengNee
1) cot0= -7/2, cos0

should be equal to right?

Or you mean ?

If yes, then

http://img156.imageshack.us/img156/8163/38447013.png

By Pythagorous Theorem, you can get .

will be -ve when II and IV quadrants.

2) tan=1(1)

Where is the reference angle for your tangent?

3) sin-1(1)

Do you mean ?

If yes,

From the graph of sine, the angle should be