Question

Precalc help.. verifying the trig identities..

Answer 1

\[\frac{ 1 }{ \sin x -1 } - \frac{ 1 }{ \sin x + 1 }= -2\cos^2x\]

Answer 2

thats what i get

Answer 3

how did you end up manipulating each side of the equation to get that answer..

Answer 4

i just find commun denominator of the left side

Answer 5

One of you guys must be wrong. hehehe.... I think @chlobohoe posted the wrong question

Answer 6

Your right hand sides are not the same

Answer 7

no this is definitely the right question... I am suppose to verify the identity. And if its not the same... that's the point

Answer 8

But I am with @myko , his argument is flawless.

Answer 9

I think ther should be a mistake in the book. Try resting right hand side from the left. If you get 0, it is right. If not....

Answer 10

im not saying he is wrong I'm wondering how he got what he did. The point is if it doesn't match THEN THE IDENTITY IS FALSE

Answer 11

to get why i got, just find commun denominator

Answer 12

my answers are "yes" or "no"... in this case being "No" because the identitys DO NOT match. and @myko do you mind helping me see the explanation

Answer 13

Oh, I see. but the problem should not be "Verifying". If we see this statement, we know that the trig MUST BE right, not yes or no question.

Answer 14

well then my teacher would be the one to take that up with.. haha i'm just trying to understand the problem

Answer 15

okay @myko that makes sense but then how did you get the denominator to equal what it did in the first equation