1. anonymous

Simplify $\sqrt{\frac{ (1-\cos \theta)(1+\cos \theta) }{ \cos ^{2} \theta}}$

2. anonymous

$\sqrt{\sin \theta}$ $\pm \sin \Theta$ $\pm \cos \Theta$ $\left| \tan \Theta \right|$

3. Vocaloid

hint: (1-cos theta)(1+cos theta) = 1 - cos^2(theta) = sin^2(theta(

4. anonymous

So it'd be A?

5. Vocaloid

nope, try multiplying out (1-cos(theta))(1+cos(theta)) under the radical and converting to sin^2(theta) remember you've still got cos^2(theta) in the denominator

6. Vocaloid

|dw:1432863667930:dw|

7. anonymous

Okay.. I'm not exactly sure what to do next. I'm on the last question of my assignment and I haven't been very good at this part

8. Vocaloid

hint: |dw:1432863783112:dw|

9. anonymous

So it'd be |dw:1432863826728:dw|

10. Vocaloid

right, keep going! how can we simplify this down to one expression?

11. anonymous

you would divide cos (theta) from sin (theta) correct? I'm not exactly sure what we'd get though

12. Vocaloid

sin(theta)/cos(theta) = tan(theta) you must memorize this equation, you will need it!

13. anonymous

So it would be D. I will thank you :)

14. Vocaloid

right, good job