Question : The ozone layer protects us from:

Option 1: Cosmic rays

Option 2: Ultraviolet rays

Option 3: Visible rays

Option 4: Infrared rays

Question : Ozone layer above the surface of the Earth provides a shield against

Option 1: X- Rays

Option 2: Ultra-violet rays

Option 3: Gamma rays

Option 4: Infra-red Rays

Question : If $\sin \alpha+\cos \alpha=\frac{2}{\sqrt{3}}$, then what is $(\tan \alpha+\cot \alpha)$ equal to?

Option 1: 1

Option 2: 2

Option 3: 6

Option 4: 0

Question : If $\cos 5 \alpha=\sin \alpha$ and $5 \alpha<90^{\circ}$, then the value of $\tan 2 \alpha$ is:

Option 1: $\sqrt{2}$

Option 2: $\frac{1}{\sqrt{2}}$

Option 3: $\frac{1}{\sqrt{3}}$

Option 4: $\sqrt{3}$

Question : If $\sin(3\alpha -\beta )=1$ and $\cos(2\alpha+\beta)=\frac{1}{2}$, then the value of $\tan \alpha$ is:

Option 1: $0$

Option 2: $\frac{1}{\sqrt{3}}$

Option 3: $1$

Option 4: $\sqrt{3}$