identities

?
N C W T N G Q F Q I V L K
R Q N L N O L G W N V K C
D I X A G P T T R D I I W
O U H N W E I P E U X O F
J U R T S C B E R M I J
Y W U X X J K P J B C V I
U P U N R F R T M E L X
I C U C A L G D J X S B D
T O D E T C S D M T O J K
A T B S L D K H J F C U I
Y X B M F D E W B F K G W
X Y T D W T C P U P L Y F
P S T D V U C P L W X V A

Clues

  • 1 + cot²x (7)
  • cosx/sinx (4)
  • sinx/cosx (4)
  • tan²x + 1 (5)

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