Question

sin2A/(1-cos2A)=cosA/sinA

how can i prove this?

Answer 1

Answer:

Helicase unwinds the helix, and single-strand binding proteins prevent the helix from re-forming. ... Single-strand binding proteins coat the DNA around the replication fork to prevent rewinding of the DNA. Topoisomerase works at the region ahead of the replication fork to prevent supercoiling.

Step-by-step explanation:

Answer 2

Answer:

$\frac{ \sin(2a) }{1 - \cos(2a) } = \frac{ \cos(a) }{ \sin(a) } \\ lhs = \frac{ \sin(2a) }{ 1 - \cos(2a) } \\ \: \: \: \: \: \: \: \: = \frac{2 \sin(a) \cos(a) }{2 { \sin(a) }^{2} } \\ \: \: \: \: \: \: \: \: = \frac{ \cos(a) }{ \sin(a) } \\ \: \: \: \: \: \: \: \: \: = rhs \\ proved \:$