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

যদি SinA SinB - CosA CosB + 1 = 0 হয়, তাহলে CotA TanB এর মান হবে:

1
-1
2
0
3
1
4
এর মধ্যে কোনটিই নয়
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