Question

Find the identical expression for the following.
1-sin^4x\1+sin^2x

Answer 1

write 1 = 1^2 and \(\sin^4x=(\sin^2x)^2\)
then, use the formula \(a^2-b^2=(a+b)(a-b)\)
then see what gets cancelled!

Answer 2

just factor the numerator, its the difference of 2 squares

Answer 3

thank you