railway DFCCIL Executive 2025 Mock Test Quantitative Aptitude Trigonometry Circular Measure of Angles
The value of -cot66° + 1 – tan24° tan21° + (2 sin31° cos 31°/cos28°) – cot69° is _____.
1
0
2
-1
3
1
4
2
The value of -cot66° + 1 – tan24° tan21° + (2 sin31° cos 31°/cos28°) – cot69° is _____.