Question

The person who can prove this all question will get the brailiest award

Answer 1

This only has answer 1. these proofs are really long, so hard to fit them all in one answer.

Explanation:

`cos^2A+sin^2A=1\\` : Will be used very often so just remember this equality.

1. Multiply
`(1+SinA)*(CosA)/(1-SinA) +(CosA)/(1+SinA) *(1-SinA)=2secA\\`

When we factor out the terms, we are left with:

• 
  `(CosA)/(1-Sin^2A) +(CosA)/(1-Sin^2A) =2secA`

We then use the rule above and convert it to
`cos^2A`:

• 
  `(1)/(CosA) +(1)/(CosA) =2secA`
• 
  `2secA=2secA`

Answer 2

Explanation:

Attached