Thread: Some trig questions part 1

Please help.

1) .........(Jhevon says: what?)
2)
3)

Originally Posted by donnyB

Please help.

1) cot0= -7/2, cos0
2) tan=1(1)
3) sin-1(1)

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