Question

Prove that : 1/cos A + sin A -1 + 1/cos A + sin A - 1 = cosec A + sec A ​

Answer 1

Answer in attachment:

Some identities:

• sin²∅+cos²∅ = 1.
• sec²∅-tan²∅ = 1.
• csc²∅-cot²∅ = 1,.