Question

(cos^4A - sin^4A) is equal to​

Answer 1

Answer:

cos²@-sin²@=cos2@=2cos²@ -1=1-2sin²@

Step-by-step explanation:

cos⁴@-sin⁴@

(cos²@)²-(sin²@)²

(cos²@+sin²@)(cos²@-sin²@)

cos²@-sin²@

Answer 2

Answer:

here is your answer.

I consider A=theta