Question

sec 0 -1
sec 0 +1
sec 0 +1
sec 0 - 1
2 cosec 0
that:​

Answer 1

0-1 =-0
0+ 1=1
0+1=1
0-1=-0

Answer 2

sec0 =1

1-1=0

sec0-1=0

sec0+1=2

(1+1=2)

2cosec0=2×infinity =this answer isn't possible

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