(cosA⁴-sinA⁴) is equal to
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Answer:
13 {x}^{2} y \: and \: 91 {x}^{3} {y}^{2}
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Answer:
Step-by-step explanation:
(cos ^4 A -sin^4A)
=(cos^2A+sin^2A)(cos^2A-sin^2)
=(cos^2A - Sin^2A)
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