railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
જો \(\rm \sqrt{\frac{1-\cos \theta}{1+\cos \theta}} \times \sqrt{\frac{cosec \ \theta- \cot \theta}{cosec \ \theta+ \cot \theta}} =\frac{1-r}{1+r} \) , તો rની કિંમત શોધો.
1
sin θ
2
cosec θ
3
sec θ
4
cos θ