Wednesday

April 16, 2014

April 16, 2014

Posted by **Alice** on Saturday, February 21, 2009 at 5:37pm.

work on one side only...so i worked on the right

=(sinx-siny)(sinx+siny) does that equal

sin(x-y)sin(x+y)??? help!

- trig!! -
**drwls**, Saturday, February 21, 2009 at 5:57pmDuplicate post; already answered.

Refer to your previous post.

**Related Questions**

Trig - Sin(X-y)sin(x+y)=sin^2 x - sin^2 y work on one side only...so i worked on...

trig - Okay, I've been getting some of these, but I can't seem to verify this ...

calculus - Could someone check my reasoning? thanx Find the derivative of the ...

Math help again - cos(3π/4+x) + sin (3π/4 -x) = 0 = cos(3π/4)cosx...

TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...

pre calc trig check my work please - sin x + cos x -------------- = ? sin x sin ...

tigonometry - expres the following as sums and differences of sines or cosines ...

Trig - Simplify sin x cos^2x-sinx Here's my book's explanation which I don't ...

Calculus - Can someone help me find the derivatives of these questions? For ...

trig - it says to verify the following identity, working only on one side: cotx+...