Verified Answer :

Kunchan

The basic rule of cos is
cos x = 1 / sec x

so
sec 2x = 1 / cos 2x

cot 2x = 1 / tan 2x
tan 2x = sin 2x / cos 2x

so
cot 2x = cos 2x / sin 2x

therefore
sec2x cot2x
(1/cos2x) * (cos2x / sin2x)
1 / sin 2x

but sin 2x = 1 / cosec 2x

so the answer is cosec 2x

skydreammer50923

Answer:

The other guy was right, the answer is option B

Step-by-step explanation:

B.  csc^2x

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