Question

pls anwer I will mark it as brainliest​

Answer 1

Answer:

Its a rule. you can take hep of Google

Answer 2

Answer:

Step-by-step explanation:

let theta be x(not needed, just because it is not supported in this device)$\frac{\sqrt{cosecx-1}}{\sqrt{cosecx+1}} + \frac{\sqrt{cosecx+1}}{\sqrt{cosecx-1}}$=LHS

⇒$\frac{cosecx-1+cosecx+1}{cosecx-1 }$

⇒$\frac{2cosecx}{cotx }$

⇒$\frac{2}{sinx}*\frac{sinx}{cosx}$

⇒$\frac{2}{cosx}$

⇒2secx=RHS

∴RHS=LHS

Hence proved

pls mark as brainliest