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Use a halfangle identity to find the evact value of each function.
A.) Tan 165 degrees
I have tried and cannot come up with the right answer. Can I have some help?
 one year ago
 one year ago
Use a halfangle identity to find the evact value of each function. A.) Tan 165 degrees I have tried and cannot come up with the right answer. Can I have some help?
 one year ago
 one year ago

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haleyking345Best ResponseYou've already chosen the best response.0
Exact not evact sorry
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
2*165º = 330º = 360º  30º Reference Angle 30º
 one year ago

exravenBest ResponseYou've already chosen the best response.1
\[\tan \left( \frac{x}{2} \right) = \frac{\sin x}{1 + \cos x}\] plug x = 330º
 one year ago

haleyking345Best ResponseYou've already chosen the best response.0
i did that, and i checked the answer in the back and it did not go right. I messed up somewhere but i do not know where.
 one year ago

exravenBest ResponseYou've already chosen the best response.1
maybe you forgot to rationalize the denominator?
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
Did you consider the quadrant? 330º is Quadrant IV (Tangent is Negative). 165º is Quadrant II (Tangent is negative) Please show your work and we'll be able to see where you wander off.
 one year ago

haleyking345Best ResponseYou've already chosen the best response.0
dw:1357957749155:dw
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
@exraven wins. Just rationalize the denominator!
 one year ago

haleyking345Best ResponseYou've already chosen the best response.0
how do you do that?
 one year ago

exravenBest ResponseYou've already chosen the best response.1
multiply by the conjugate
 one year ago

exravenBest ResponseYou've already chosen the best response.1
\[\frac{1}{2 +\sqrt{3}}\]multiply by \[\frac{2 \sqrt{3}}{2  \sqrt{3}}\]
 one year ago

haleyking345Best ResponseYou've already chosen the best response.0
the answer is square root 3 minus 2 in the book. I cannot quite get it to match
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
Again, let's see your work. We'll be able to tell where you wander off.
 one year ago

haleyking345Best ResponseYou've already chosen the best response.0
dw:1357958794041:dw
 one year ago

exravenBest ResponseYou've already chosen the best response.1
yes, what is the value of square root of 9?
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
That's it. Don't panic that it does not yet match the book. Keep going!
 one year ago

haleyking345Best ResponseYou've already chosen the best response.0
dw:1357959061747:dw
 one year ago
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