## Example 3 4 Exemplar Problems Chapter 3 Class 11

Example 3 Find the value of $$\sqrt3\cosec20°-\sec20°$$
Example 4 If θ lies in the second quadrant, then show that $$\sqrt{\frac{1-\sin\theta}{1+\sin\theta}}+\sqrt{\frac{1+\sin\theta}{1-\sin\theta}}=-2\sec \theta$$