railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

What is the value of cosec235° - 2 sec255°  + 1 + sin 45° + cot 235° 

1
(1/√3)
2
(1/2)
3
(1/√2)
4
0
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