railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

जर \(\frac{\cos \theta }{1-sin\theta }-\frac{cos\theta }{1+sin\theta }=2\) 'θ' ची किंमत शोधा.

1
६०°
2
90°
3
४५°
4
30°
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