Question

i need help

Answer 1

help in wat

Answer 2

use half angle formulas to rewrite \[\sqrt{1-\cos30 degrees/2}\]

Answer 3

\[\sin (\theta/2) = \sqrt{(1-\cos \theta)/2}\]

Answer 4

using that formula o but..

Answer 5

so you can rewrite it as sin(15)

Answer 6

hwo do i get there i cantsee

Answer 7

??

Answer 8

what i mean the answer of the problem i sin 15
how do i get there id ont understand

Answer 9

theta = 30 so theta/2 = 30/2 = 15

Answer 10

can u show that

Answer 11

show what...prove that 30/2 = 15

Answer 12

no the whole process

Answer 13

well i looked up the half-angle identity for sin (theta/2)
**shown above**
it matches your expression except you have 30 degrees for the angle

Answer 14

ok
,..?

Answer 15

and

Answer 16

ok

Answer 17

nee help trig= rewrite this using half angle formula
sqrt{1= \cos 135 degress/2}\]

Answer 18

is that a plus or minus ?

Answer 19

sorry
let me rewrite it

Answer 20

\[rewrtite using half aangle formulas \sqrt{1+ \cos 135 dgrees/2}\]

Answer 21

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)

Answer 22

so that my asnwer
my teacher doesn tlike decimals

Answer 23

then write it as a fraction...the main thing is do you get the concept?
find appropriate formula , then take half the angle

Answer 24

hello?

Answer 25

can u show me thewhole process
and ow do is hwo it in fraction

Answer 26

hello

Answer 27

what wre u gonnaa say

Answer 28

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 half-angle formulas
the fraction would simply be 135/2

http://www.freemathhelp.com/trig-double-angles.html

Answer 29

need help trig rewrite using half angle idnetities =1-cos210 degress/sin210 degrees

Answer 30

need help trig rewrite using half angle idnetities =1-cos210 degress/sin210 degrees

Answer 31

heloo

Answer 32

\[\rightarrow \frac{1-\cos 210}{\sin 210}\]

Answer 33

yes i know the formula i dont know how to use it

Answer 34

please don;t message me the same thing you are posting,
thanks

and this is different it isn't any of the half-angle formulas

Answer 35

no yes

Answer 36

\[\frac{1-\cos 210}{\sin 210} = \csc 210 - \cot 210\]
not sure how else to rewrite it unless you want to use sum/difference formulas

Answer 37

ok tanks

Answer 38

s o how do i ewrite using half angle idnetities =1-cos210 degress/sin210 degrees

Answer 39

by just saying it equals to 1-cos theta/sin theta

Answer 40

???

Answer 41

umm i already answered you before regarding this question

Answer 42

no i dont grasp it

Answer 43

i don't think you can rewrite using half-angle formulas
look for yourself...see that the expression does not match any the formulas

Answer 44

its what it says n my book

Answer 45

yes it does tan theta /2

Answer 46

hello

Answer 47

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