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ana321Best ResponseYou've already chosen the best response.0
use half angle formulas to rewrite \[\sqrt{1\cos30 degrees/2}\]
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
\[\sin (\theta/2) = \sqrt{(1\cos \theta)/2}\]
 one year ago

ana321Best ResponseYou've already chosen the best response.0
using that formula o but..
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
so you can rewrite it as sin(15)
 one year ago

ana321Best ResponseYou've already chosen the best response.0
hwo do i get there i cantsee
 one year ago

ana321Best ResponseYou've already chosen the best response.0
what i mean the answer of the problem i sin 15 how do i get there id ont understand
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
theta = 30 so theta/2 = 30/2 = 15
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
show what...prove that 30/2 = 15
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
well i looked up the halfangle identity for sin (theta/2) **shown above** it matches your expression except you have 30 degrees for the angle
 one year ago

ana321Best ResponseYou've already chosen the best response.0
nee help trig= rewrite this using half angle formula sqrt{1= \cos 135 degress/2}\]
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
is that a plus or minus ?
 one year ago

ana321Best ResponseYou've already chosen the best response.0
sorry let me rewrite it
 one year ago

ana321Best ResponseYou've already chosen the best response.0
\[rewrtite using half aangle formulas \sqrt{1+ \cos 135 dgrees/2}\]
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
plus means its the cosine half angle formula take the given angle > 135 divide it by 2 > 135/2 = 67.5 answer = cos(67.5)
 one year ago

ana321Best ResponseYou've already chosen the best response.0
so that my asnwer my teacher doesn tlike decimals
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
then write it as a fraction...the main thing is do you get the concept? find appropriate formula , then take half the angle
 one year ago

ana321Best ResponseYou've already chosen the best response.0
can u show me thewhole process and ow do is hwo it in fraction
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
are you serious...i showed you step by step...there is no other process you should have a reference in your book or notes showing the halfangle formulas the fraction would simply be 135/2 http://www.freemathhelp.com/trigdoubleangles.html
 one year ago

ana321Best ResponseYou've already chosen the best response.0
need help trig rewrite using half angle idnetities =1cos210 degress/sin210 degrees
 one year ago

ana321Best ResponseYou've already chosen the best response.0
need help trig rewrite using half angle idnetities =1cos210 degress/sin210 degrees
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
\[\rightarrow \frac{1\cos 210}{\sin 210}\]
 one year ago

ana321Best ResponseYou've already chosen the best response.0
yes i know the formula i dont know how to use it
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
please don;t message me the same thing you are posting, thanks and this is different it isn't any of the halfangle formulas
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
\[\frac{1\cos 210}{\sin 210} = \csc 210  \cot 210\] not sure how else to rewrite it unless you want to use sum/difference formulas
 one year ago

ana321Best ResponseYou've already chosen the best response.0
s o how do i ewrite using half angle idnetities =1cos210 degress/sin210 degrees
 one year ago

ana321Best ResponseYou've already chosen the best response.0
by just saying it equals to 1cos theta/sin theta
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
umm i already answered you before regarding this question
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
i don't think you can rewrite using halfangle formulas look for yourself...see that the expression does not match any the formulas
 one year ago

ana321Best ResponseYou've already chosen the best response.0
its what it says n my book
 one year ago

ana321Best ResponseYou've already chosen the best response.0
yes it does tan theta /2
 one year ago

dumbcowBest ResponseYou've already chosen the best response.0
yes i am wrong...my ref sheet has a different but equivalent formula for tangent sorry...hey i learned something anyway, now just take half the angle
 one year ago
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