If $\frac{cos\theta}{1-sin\theta}+\frac{cos\theta}{1+sin\theta}$ =4, then the value of $ \theta (0° < \theta < 90°)$ is

If $\frac{cos\theta}{1-sin\theta}+\frac{cos\theta}{1+sin\theta}$ =4, then the value of $ \theta (0° < \theta < 90°)$ is
1). 60°
2). 45°
3). 30°
4). 35°

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