Question

cos^4 theta - sin^4 theta divide by cos theta-sin theta

Answer 1

@matricked

Answer 2

a^2 - b^2 =(a+b)(a-b)

Answer 3

cos^4 theta - sin^4 theta =( cos^2 theta - sin^2 theta )*(cos^2 theta + sin^2 theta )
=( cos^2 theta - sin^2 theta ) [ cos^2 theta + sin^2 theta =1 ]
=( cos theta - sin theta ) ( cos theta + sin theta )
i hope the rest u can do

Answer 4

I can do the rest
Thanks @matricked