Sunday

March 29, 2015

March 29, 2015

Posted by **Cobra7710** on Friday, September 2, 2011 at 8:48pm.

____

2

- Algebra II -
**Ms. Sue**, Friday, September 2, 2011 at 8:56pmTimmy, Ryland, Cobra, Timmy -- you must be having an identity crisis tonight.

Please use the same name for all of your posts.

- Algebra II -
**Reiny**, Friday, September 2, 2011 at 9:07pmcosØ = -√3/2

1. find the reference angle

(using the positive result √3/2 , use inverse cos to get and angle of 30°

( Make yourself familiar with the ratio of sides of the 30-60-90 triangle)

2. Where is the angle Ø ?

Since the cosine is negative in II and III

in II : Ø = 180-30 or 150°

or

in III : Ø = 180+30 = 210°

- Algebra II -
**Cobra7710**, Saturday, September 3, 2011 at 4:06amoh so we only want reference angle. i thought values meant sin,cos,and tan. how do you know it only wanted reference angle?

- Algebra II -
**Reiny**, Saturday, September 3, 2011 at 7:29amdidn't it say,

"Find the values of Ø" ,**not**find the values of sinØ etc ?

Finding the reference angle is only the first step, from there you have to decide what to do with that reference angle depending on the position of Ø and the values of cosØ

**Answer this Question**

**Related Questions**

Algebra II - Multiple Choice (theta) means the symbol 0 with the dash in it. 1.)...

Pre Cal - 2cos 4theta + 1 = 0 i know how to find the degrees (the last step of ...

Math - Trigonometry - For how many values of theta such that 0<theta<360 ...

Algebra II - Find the exact value of sin(theta/2) if cos theta = 2/3 and 270 ...

trig - find two values of theta, zero degrees is than or equal to theta which is...

Trig(continued) - 2)Find the solution of sin2 theta = cos theta if 0 -< theta...

Trig - Given 2secant^2 (theta) + 1 = 5 secant (theta), solve for (theta), to the...

Calculus - I wanted to confirm that I solved these problems correctly (we had to...

Mathematics - 1. Show that Sin3 Theta - Cos2 Theta = (1 - Sin Theta)(4Sin^2 ...

math - theta is an angle in standard position with a domain of 0 degrees < ...