Question

cos to the power 4 A minus sin to the power 4 A? dont spam​

Answer 1

Answer:

Hope this may help you.

Step-by-step explanation:

Answer 2

Answer:

1 - sin²A

Step-by-step explanation:

Given, cos⁴A - sin⁴A

=> (cos²A)² - (sin²A)²

=> (cos²A + sin²A)(cos²A - sin²A)

=> (1)(cos²A - sin²A)

=> cos²A - sin²A

=> 1 - sin²A - sin²A

=> 1 - 2sin²A

Hope it helps!