1. ## High School Trig

Simplify

cos^4 x + 2cos^2 x sin^2 x + sin^4 x

2. Originally Posted by acherucheril
Simplify

cos^4 x + 2cos^2 x sin^2 x + sin^4 x
Hint: Let cos^2 x = a and sin^2 x = b and see if that helps you think it out.

3. Originally Posted by Debsta
Hint: Let cos^2 x = a and sin^2 x = b and see if that helps you think it out.
still confused. =/

4. Originally Posted by acherucheril
still confused. =/
your expression is a perfect square trinomial ... factor it.

5. Originally Posted by acherucheril
still confused. =/
Your expression is of the form:
$a^2+2ab+b^2$
Ring any bells??