Question

Prove That

cot 2A + tan 2A cot 2A-tan 2A = sec 4A​

Answer 1

*Refer the graph

Explanation:

Blue : y= cot 2A + tan 2A cot 2A-tan 2A

domain a ≠ kπ/4

Yellow : y= sec 4A

domain a ≠ π/8 + kπ/4

vertical intercept (0,1)