Question

Math help ! Medals will be given !

Answer 1

ok redy

Answer 2

Simplify the trigonometric expression

Answer 3

@jim_thompson5910

Answer 4

how bout me

Answer 5

What about you ?

Answer 6

never mind

Answer 7

I mean if you can help that will be great if not then move on.

Answer 8

@smartguy1124 help her or not? if you do, i don't.

Answer 9

@phi

Answer 10

OK

Answer 11

Hints:

sin^2(x) = 1 - cos^2(x)

and

a^2 - b^2 = (a-b)(a+b)

Answer 12

Is this the formula i will need ?

Answer 13

yes, you will use this to simplify

Answer 14

Okay then what ?

Answer 15

tell me what you get when you use the identity sin^2(x) = 1 - cos^2(x)

then you factor the numerator using a^2 - b^2 = (a-b)(a+b)

Answer 16

See this is what i don't understand.

Answer 17

where are you stuck

Answer 18

This whole problem.

Answer 19

well first you replace sin^2(x) with 1 - cos^2(x)

then you factor 1 - cos^2(x) to get ______

Answer 20

cos^2

Answer 21

1 - cos^2(x) is the same as 1^2 - cos^2(x)

now you use the difference of squares factoring rule

Answer 22

are you asking me or telling me lol

Answer 23

what do you mean

Answer 24

Nvm. Was my answer wrong .

Answer 25

yes 1-cos^2 is not cos^2

Answer 26

what is it ?

Answer 27

do you know what I mean when I say "use the difference of squares rule"?

Answer 28

if not, then something like 4 - x^2 turns into (2-x)(2+x) using that rule

Answer 29

okay i seee what your saying. Iv been on this problem for an hour.

Answer 30

so how does 1 - cos^2(x) factor

Answer 31

(2+x)(1-x)

Answer 32

no (2+x)(1-x) is just an example of how the difference of squares rule works

Answer 33

This is confusing.

Answer 34

have a look at this page

http://www.purplemath.com/modules/specfact.htm

Answer 35

Okay i looked at it

Answer 36

so how would you factor 1 - cos^2(x)

Answer 37

I didn't see any of those with cos in it only easy numbers.

Answer 38

ok replace cos(x) with y to make things easier

1 - cos^2(x)

turns into

1-y^2

which factors to ???

Answer 39

(y+2)(y-2)

Answer 40

no

Answer 41

1-y^2

turns into

1^2-y^2

which factors to ???

Answer 42

i give up idk

Answer 43

don't give up

take a break if you must, but definitely don't give up on it

Answer 44

can we just skip this problem. and move on to another problem.

Answer 45

ok I'll give you the next step

1 - cos^2(x)

factors to

(1-cos(x))(1+cos(x))

Answer 46

I'm sure you see what to do from here

Answer 47

ok what do i do next.

Answer 48

well you now have

(1-cos(x))(1+cos(x))
------------------
1-cos(x)

Answer 49

ok then what ?

Answer 50

what cancels

Answer 51

1-cos?

Answer 52

yep, leaving you with what

Answer 53

@satellite73