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ana321
 3 years ago
i need help
ana321
 3 years ago
i need help

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ana321
 3 years ago
Best ResponseYou've already chosen the best response.0use half angle formulas to rewrite \[\sqrt{1\cos30 degrees/2}\]

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0\[\sin (\theta/2) = \sqrt{(1\cos \theta)/2}\]

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0using that formula o but..

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0so you can rewrite it as sin(15)

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0hwo do i get there i cantsee

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0what i mean the answer of the problem i sin 15 how do i get there id ont understand

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0theta = 30 so theta/2 = 30/2 = 15

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0show what...prove that 30/2 = 15

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

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0nee help trig= rewrite this using half angle formula sqrt{1= \cos 135 degress/2}\]

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0is that a plus or minus ?

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0\[rewrtite using half aangle formulas \sqrt{1+ \cos 135 dgrees/2}\]

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

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0so that my asnwer my teacher doesn tlike decimals

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

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0can u show me thewhole process and ow do is hwo it in fraction

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0are 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

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0need help trig rewrite using half angle idnetities =1cos210 degress/sin210 degrees

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0need help trig rewrite using half angle idnetities =1cos210 degress/sin210 degrees

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0\[\rightarrow \frac{1\cos 210}{\sin 210}\]

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0yes i know the formula i dont know how to use it

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

dumbcow
 3 years ago
Best 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

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0s o how do i ewrite using half angle idnetities =1cos210 degress/sin210 degrees

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0by just saying it equals to 1cos theta/sin theta

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0umm i already answered you before regarding this question

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

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0its what it says n my book

ana321
 3 years ago
Best ResponseYou've already chosen the best response.0yes it does tan theta /2

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0yes 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
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