defence exam Indian Navy Chargeman/Draughtsman Mock Test 2023 Quantitative Aptitude Trigonometry

\(\frac{\cos \theta}{\sec \theta-1}+\frac{\cos \theta}{\sec \theta+1}\) બરાબર છે :

1
2sec2θ 
2
2cot 2 θ
3
2cos 2 θ
4
2sin 2 θ
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