Let's simplify the expression step by step:
sin^4L + sin^2Lcos^2L / (1 - sin^2L + sin2L) / (2sinLcosL)
= sin^4L + sin^2Lcos^2L * (2sinLcosL) / (1 - sin^2L + sin2L)
= sin^4L + 2sin^3Lcos^3L / (1 - sin^2L + sin2L)
= sin^4L + 2sin^3Lcos^3L / (1 - sin^2L + 2sinLcosL)
= sin^4L + 2sin^3Lcos^3L / (1 - sinL)^2
= sin^4L + 2sin^3Lcos^3L / (1 - 2sinL + sin^2L)
So, the simplified expression is:
sin^4L + 2sin^3Lcos^3L / (1 - sinL)^2
Let's simplify the expression step by step:
sin^4L + sin^2Lcos^2L / (1 - sin^2L + sin2L) / (2sinLcosL)
= sin^4L + sin^2Lcos^2L * (2sinLcosL) / (1 - sin^2L + sin2L)
= sin^4L + 2sin^3Lcos^3L / (1 - sin^2L + sin2L)
= sin^4L + 2sin^3Lcos^3L / (1 - sin^2L + 2sinLcosL)
= sin^4L + 2sin^3Lcos^3L / (1 - sinL)^2
= sin^4L + 2sin^3Lcos^3L / (1 - 2sinL + sin^2L)
= sin^4L + 2sin^3Lcos^3L / (1 - sinL)^2
So, the simplified expression is:
sin^4L + 2sin^3Lcos^3L / (1 - sinL)^2