Question

*(1-cosA)(1+cosA) = ?*

1️⃣ cos²A
2️⃣ sin²A
3️⃣ tan²A
4️⃣ sec²A​

Answer 1

Option 2 is the correct one

• (1 - cosA)(1 + cosA)
• 1 - cos²A
• sin²A