A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
i need help
anonymous
 4 years ago
i need help

This Question is Closed

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

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

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

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

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

anonymous
 4 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
 4 years ago
Best ResponseYou've already chosen the best response.0theta = 30 so theta/2 = 30/2 = 15

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

dumbcow
 4 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

anonymous
 4 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
 4 years ago
Best ResponseYou've already chosen the best response.0is that a plus or minus ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0sorry let me rewrite it

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

dumbcow
 4 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)

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

dumbcow
 4 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

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

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0what wre u gonnaa say

dumbcow
 4 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

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

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

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

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

dumbcow
 4 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
 4 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

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

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

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

dumbcow
 4 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

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

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

dumbcow
 4 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
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.