Re: Finding Reference Angle

Quote:

Originally Posted by

**vaironxxrd** Hello again and again Everyone,

I'm having trouble finding a reference angle for the following angle.

$\displaystyle \theta = -1.8$

The book provides me with the answer which is $\displaystyle \theta' \approx 1.342 $

But I cannot reach it, through my procedures.

I know the following is WRONG. But I'm trying to layout my method, to know where am I messing up.

I'm converting theta to be degrees, since it is easier for me.

-1.8 * 180 = -324

Angle coterminal to -324 = 36

Reference angle = 90 - 36

^- This is definitely wrong but I can't think of any other methods.

Your angle is in quadrant IV so the reference angle of +324 would be 360 - 324 = 36.

Also, did you remember to convert back to radians?

-Dan

Re: Finding Reference Angle

Quote:

Originally Posted by

**vaironxxrd** Hello again and again Everyone,

I'm having trouble finding a reference angle for the following angle.

$\displaystyle \theta = -1.8$

The book provides me with the answer which is $\displaystyle \theta' \approx 1.342 $

Please forget about ever using degrees.

Take a look at this webpage.

Because $\displaystyle \frac{\pi}{2}<1.8<\pi$ the reference angle is $\displaystyle \pi-1.8$.

Re: Finding Reference Angle

Quote:

Originally Posted by

**Plato** Please forget about ever using degrees.

Take a look at this

webpage.

Because $\displaystyle \frac{\pi}{2}<1.8<\pi$ the reference angle is $\displaystyle \pi-1.8$.

Really... Just forget about it (Worried)?

(Crying)