defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Mathematics Trigonometry Multiple and Sub-multiple Angles
Value of cos (-1230°) × cot (-315°) is
1
\(\frac{-\sqrt3}{2}\)
2
\(\frac{2}{\sqrt3}\)
3
\(\frac{1}{2}\)
4
\(-\frac{1}{2}\)