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(sec psi-tan psi)^2 (1+sin psi)^2 div si...

`(sec psi-tan psi)^2 (1+sin psi)^2 div sin^2 psi` =?

A

a)`cos psi`

B

b)`cot^2 psi`

C

c)`sec psi`

D

d)`cos^2 psi`

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