Question

prove that sin4a/cos2a*1-cos2a/1-cos4a=tana

Answer 1

Answer:

following identities are used in solving the question :

Step-by-step explanation:

$1 - \cos(2a) \: = 2 { \sin^{2} (a) }$

$1 - \cos(4a) \: = 2 { \sin^{2} (2a) }$

$sin(2a) \: = 2 \sin(a) \cos(a)$

$sin(4a) \: = 2 \sin(2a) \cos(2a)$