Just simplify. See picture that is attaches. I know the even odd properties I know sin(-x) is -sinx. After that I got stuck. I tried to multiply by conjugate didnt work.

Printable View

- June 28th 2013, 08:30 PMMelcarthusVerify Trig Identities:Simplify W/Picture
Just simplify. See picture that is attaches. I know the even odd properties I know sin(-x) is -sinx. After that I got stuck. I tried to multiply by conjugate didnt work.

- June 28th 2013, 08:37 PMShadowKnight8702Re: Verify Trig Identities:Simplify W/Picture
The answer is sin(x). So you have sin^2(-x)- sin(-x) / 1 - sin(-x) . sin^2(-x) is really just sin(-x) * sin(-x), which becomes -1*-1*sin(x)*sin(x) = sin^2 (x). So you have sin^2 (x) - sin(x) / sin(x) + 1. Take out the sin(x) on the top and you have

(sin(x)( sin(x) + 1)) / (sin(x) + 1). Cancel out the (sin(x)+1) and you have sin(x) left. - June 28th 2013, 08:48 PMMelcarthusRe: Verify Trig Identities:Simplify W/Picture
Any advice for verifying trig identities?

- June 28th 2013, 08:49 PMMelcarthusRe: Verify Trig Identities:Simplify W/Picture
Its kinda hard wo read that Shadow can you do it on paint and upload picture?

- June 28th 2013, 08:57 PMShadowKnight8702Re: Verify Trig Identities:Simplify W/Picture
View: j5bwY4.png - cubeupload

Does that make sense? - June 29th 2013, 06:03 PMSorobanRe: Verify Trig Identities:Simplify W/Picture
Hello, ShadowKnight8702!

Your work is correct.

Quote:

. . .

. . .

. . .

. . .

. . .

- June 29th 2013, 07:55 PMMelcarthusRe: Verify Trig Identities:Simplify W/Picture
I got it thanks for your help both of you.