Please help.
1) .........(Jhevon says: what?)
2)
3)
1) cot0= -7/2, cos0
should be equal to right?
Or you mean ?
If yes, then
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