Posted by **Joe** on Thursday, January 14, 2010 at 1:43pm.

I do not understand how to do this problem

((sin^3 A + cos^3 A)/(sin A + cos A) ) = 1 - sin A cos A

note that all the trig terms are closed right after there A's

example

sin A cos A

=

sin (A) cos (A)

I wrote it out like this

0 = - sin^6 A - cos^6 A + 2sin^3 A cos^3 A - 2sin^3 A - 3sin^2 A cos^2 A - 2sinA cosA + 1

I graphed the problem and my solution and got the same line so my questio is how do i simplify thank you????

## Answer This Question

## Related Questions

- TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
- trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...
- algebra - Can someone please help me do this problem? That would be great! ...
- tigonometry - expres the following as sums and differences of sines or cosines ...
- trig - The expression 4 sin x cos x is equivalent to which of the following? (...
- Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
- Math - Calculus - The identity below is significant because it relates 3 ...
- Trig - Find sin(s+t) and (s-t) if cos(s)= 1/5 and sin(t) = 3/5 and s and t are ...
- Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...
- pre-cal - Simplify the given expression........? (2sin2x)(cos6x) sin 2x and cos ...

More Related Questions