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If sin A + sin²A = 1, then the value of the expression (cos² A + cos⁴A) =

A1

B1/2

C2

D3

Answer:

A. 1

Read Explanation:

sin²𝚹 + cos²𝚹 = 1 sin A + sin²A = 1 sin A = 1 - sin²A (sin A)² = (cos² A)² sin²A = cos⁴ A 1- cos²A = cos⁴ A = cos ⁴ A + cos² A

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