Question

10. (cos⁴A - sin⁴ A) is equal to:
a) 1 - 2 cos²A
b) 2 sin² A - 1
c) sin²A - cos²A
d) 2 cos²A-1​

Answer 1

Answer:

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Answer 2

Answer:

(D) 2 cos²A-1

Step-by-step explanation:

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